Here are some things to note when looking through the Priest's abilities. Any attack/spell that's labeled as an Instant, is just that, Instant, and is not affected or does not affect any other combat/casting timers. What this means is, you don't have to stop and cast the spell. You could cast it while running, or meleeing.

Also, as you will see, there is a # of Ranks next to each ability. For example, Holy Word: Fortitude has 6 ranks. This means there are 6 upgrades that follow from the level you get the ability to level 60. You can see what level you get Rank 1 of an ability by looking at the level under the picture for each ability. I did it this way so you could just skim through what a Priest can do, without having to filter through just basic upgrades. There are other sites out there that have this information. This page is intended to help you choose a race and a class, and fill you in on the capabilities of a Priest.

Interrupting a spell in World of Warcraft just means prolonging the time it takes to cast it by X seconds. Where as stun, will completely stop and abort a spell from being cast and needs to be cast again.

Of course all spells below cost mana. The mana cost & strength for each gets higher with each rank of the spell. Again I chose not to display mana cost details due to simplifying reasons of quickly browsing a priests. abilities. Though I did Italic the portion of the spell that grows stronger with each rank. Some spells may list something like 2-3 sec cast time in Italic. This means the spell starts at 2 seconds to cast at rank 1, then grow to 3 with higher ranks.

Spells that can be cast Instantly have their cast time of "Instant" underlined to stress the power of the spell. Instant spells are by far more powerful the spells that take time to cast, so I felt it must be noted when browsing through.

Some abilities are upgradable with talents. There will be something that looks like this: Upgradable: +15% Damage to show what the ability will max out at if upgraded with talents. You will not be able to get all of the upgrades. You earn one talent point a level starting at 10-60. So thats 50 points you can put towards talents, or only about 1.5 talent trees. Use talent calculator websites to determine what you want, talents listed here are for browsing use.

Holy Word: Fortitude (6 Ranks)

Level 1

Category: Buff (Stamina)
Cast Time: Instant
Duration: 30 min
Range: 30 yard
Type: Dicipline
Upgradable: +30% Stamina
Upgradable: -10% Mana Cost
Description: Holy power infuses the target increasing their Stamina (+30%) for 30 min.

Holy Word: Shield (10 Ranks)

Level 6

Category: Buff (Absorb)
Cast Time: Instant
Duration: 30 sec or destroyed
Cool Down: 4 sec per target or 30 (15) sec for same target
Range: 40 yard
Type: Dicipline
Upgradable: -10% Mana Cost
Upgradable: -15 sec weakend soul
Description: Draws on the soul of the target to shield them, absorbing X ammount damage. While the shield holds, spells will not be interrupted by physical attacks Once shielded, the target cannot be shielded again for 30 sec.

Inner Fire (6 Ranks)

Level 12

Category: Self Buff (Atk/Armor)
Cast Time: Instant
Duration: 3 min
Type: Dicipline
Upgradable: +45% to Buff
Upgradable: -10% Mana Cost
Description: A burst of Holy energy fills the caster, increasing his attack power (+45%) and armor (+45%)

Inner Focus (1 Rank Talent)

Level 25

Category: Self Buff
Cast Time: Instant
Cool Down: 5 min
Type: Dicipline
Description: When activated, reduces the Mana cost of your next spell by 100% and increases its critical effect chance by 25% if it is capable of a critical effect

Focused Casting (1 Rank Talent)

Level 30

Category: Self Buff (Uninterruptable)
Cast Time: Instant
Duration: 8 sec
Cool Down: 1 min
Type: Dicipline
Description: While active, you no longer lose casting time from taking damage. Lasts 8 sec.

Shadow Protection (3 Ranks)

Level 30

Category: Buff (Resistance)
Cast Time: Instant
Duration: 10 min
Range: 30 yard
Type: Shadow Magic
Upgradable: -10% Mana Cost
Upgradable: +30% Shadow Resistance
Description: Increases the target's resistance to Shadow spells by 50-100 (65-130)

Divine Spirit (1 Rank)

Level 40

Category: Buff (Spirit)
Cast Time: Instant
Duration: 30 min
Range: 30 yard
Type: Dicipline
Description: Holy power infuses the target, increasing their Spirit by 23 for 30 min..

Shadowform (1 Rank Talent)

Level 40

Category: Buff (Shapeshift)
Cast Time: Instant
Duration: Until Canceled
Cool Down: 1.5 sec
Description: Assume a Shadowform, increasing your Shadow damage by 20% and reducing Physical damage done to you by 20%. However you may only cast Shadow and Discipline spells while in this form.

Lesser Heal (3 Ranks)

Level 1

Category: Heal
Cast Time: 1.5 -2.5 sec
Range: 40 yard
Type: Holy
Upgradable: -20% Threat
Upgradable: -10% Mana Cost
Upgradable: +10% HP Healed
Upgradable: +5% Critical Chance
Upgradable: +25% to targets armor if crit
Description: Heals target

Renew (9 Ranks)

Level 8

Category: Heal over Time
Cast Time: Instant
Duration: 15 sec
Range: 40 yard
Type: Holy
Upgradable: -20% Threat
Upgradable: -10% Mana Cost
Upgradable: +5% Critical Chance
Upgradable: +30% to Healed ammount
Upgradable: +25% to targets armor if crit
Description: Heals (+20%) the target over 15 sec

Resurrection (3 Ranks)

Level 10

Category: Resurrect
Cast Time: 10 sec
Range: 40 yard
Type: Holy
Upgradable: -25% Rez Sickness
Description: Brings a dead player back to life with 15-40% of their health and mana depending on rank. Target then suffers from resurrection sickness.

Cure Disease

Level 14

Category: Cure
Cast Time: Instant
Range: 30 yard
Type: Holy
Upgradable: -10% Mana Cost
Description: Removes 1 disease effect on target

Heal (4 Ranks)

Level 16

Category: Heal
Cast Time: 3-4 sec
Range: 30 yard
Type: Holy
Upgradable: -20% Threat
Upgradable: -10% Mana Cost
Upgradable: +10% HP Healed
Upgradable: +5% Critical Chance
Upgradable: +50% Mana Regen for 10 sec & +25% to targets armor if crit
Description: Heals target

Flash Heal (7 Ranks)

Level 20

Category: Quick Heal
Cast Time: 1.5 sec
Range: 40 yard
Type: Holy
Upgradable: -20% Threat
Upgradable: +10% HP Healed
Upgradable: +5% Critical Chance
Upgradable: +70% Chance to avoid interruption
Upgradable: +50% Mana Regen for 10 sec & +25% to targets armor if crit
Description: Heals target

Prayer of Healing (4 Ranks)

Level 30

Category: Group Heal
Cast Time: 3 sec
Type: Holy
Upgradable: -20% Threat
Upgradable: -20% Mana Cost
Upgradable: +10% HP Healed
Upgradable: +5% Critical Chance
Upgradable: +50% Mana Regen for 10 sec & +25% to targets armor if crit
Description: Heals nearby party members.

Combat Resurrection (1 Rank Talent)

Level 30

Category: Resurrect
Cast Time: 2 sec
Range: 40 yard
Cool Down: 45 min
Type: Holy
Description: Brings a dead player back to life with 50% of their health and mana. The target does not suffer from resurrection sickness.

Abolish Disease

Level 32

Category: Cure
Cast Time: Instant
Duration: 20 sec
Range: 30 yard
Type: Holy
Upgradable: -10% Mana Cost
Description: Attempts to cure 1 disease effect every 5 seconds for 20 sec

Greater Heal (4 Ranks)

Level 40

Category: Big Heal
Cast Time: 4 sec
Range: 40 yard
Type: Holy
Upgradable: -20% Threat
Upgradable: -10% Mana Cost
Upgradable: +10% HP Healed
Upgradable: +5% Critical Chance
Upgradable: +50% Mana Regen for 10 sec & +25% to targets armor if crit
Description: Heals target

Healing Power

Below is the order of weakest to strongest heal from level 20 up.

Lesser Heal

Renew

Prayer of Healing

Flash Heal

Heal

Greater Heal

Healing Cost

Below is the order of lowest mana cost to highest mana cost from level 20 up.

Lesser Heal

Renew

Flash Heal

Heal

Greater Heal

Prayer of Healing

Healing Speed

Below is the order of lowest cast time cost to highest cast time from level 20 up.

Renew

Flash Heal

Lesser Heal

Prayer of Healing

Heal

Greater Heal

Psychic Scream (4 Ranks)

Level 14

Category: AoE Fear
Cast Time: Instant
Duration: 8 sec
Cool Down: 30 (26) sec
Type: Shadow Magic
Upgradable: -25% Threat
Upgradable: -10% Mana Cost
Upgradable: -10% Chance to resist
Upgradable: -4 second of cooldown time
Upgradable: +10% Chance to Stun for 3 sec
Description: The priest lets out a psychic scream, causing 2-5 nearby enemies to flee for 8 sec.

Mind Soothe (3 Ranks)

Level 20

Category: Lull (-Agro Radius)
Cast Time: Instant
Duration: 15 sec
Range: 40 yard
Type: Shadow Magic
Upgradable: -10% Mana Cost
Upgradable: -10% Chance to resist
Description: Soothes the target, reducing the range at which it will attack you by 10 yards. Only affects targets level 40-55 or lower.

Shackle Undead (3 Ranks)

Level 20

Category: Undead Mez
Target: Undead Only
Cast Time: 1.5 sec
Range: 30 yard
Duration: 30-50 sec
Type: Discipline
Upgradable: -10% resist chance
Description: Shackles the target undead enemy for up to 30-50 sec. The shackled unit is unable to move, attack or cast spells. Any damage caused will release the target. Only one target can be shackled at a time.

Mind Control (3 Ranks)

Level 30

Category: Charm
Cast Time: 3 sec
Range: 20 yard
Duration: 5 sec to 1 min
Upgradable: -25% Threat
Upgradable: -10% Chance to resist
Type: Shadow Magic
Description: Controls a humanoid mind up to level 62, but slows its attack speed by 20%. Lasts 1 min, but the target gets a chance to break free every 5 seconds.

Holy Smite (8 Ranks)

Level 1

Category: Nuke
Cast Time: 2 - 2.5 sec
Range: 30 yard
Type: Holy
Upgradable: -20% Threat
Upgradable: +5% Critical Chance
Upgradable: +100% Critical Strike Damage
Description: Smites an enemy for holy damage

Shadow Word: Pain (8 Ranks)

Level 4

Category: DoT
Cast Time: Instant
Duration: 18-24 (24-30) sec
Range: 30 (36) yard
Type: Shadow Magic
Upgradable: -45% Threat
Upgradable: +6% Damage
Upgradable: -10% Mana Cost
Upgradable: -10% Chance to resist
Upgradable: +6 seconds of duration
Upgradable: +shadow vulnerablity debuff
Upgradable: +10% Chance to Stun for 3 sec
Upgradable: +40% Damage if in Shadowform
Description: A word of darkness that causes damage (+6-40%) over 18-24 (24-30) sec.

Mind Blast (9 Ranks)

Level 10

Category: Nuke + Threat
Cast Time: 1.5 sec
Range: 30 (36) yard
Cool Down: 8 - 5.5 (5.5 - 3) sec
Type: Shadow Magic
Upgradable: -45% Threat
Upgradable: +20% Range
Upgradable: +6% Damage
Upgradable: -10% Chance to resist
Upgradable: +shadow vulnerablity debuff
Upgradable: -2.5 second of cooldown time
Upgradable: +10% Chance to Stun for 3 sec
Upgradable: +40% Damage if in Shadowform
Description: Blasts the target for shadow damage (+6-40%) , but causes a high amount of threat

Mana Burn (5 Ranks)

Level 24

Category: Mana Seive + Nuke
Cast Time: 3 sec (2 sec)
Range: 30 yard
Type: Discipline
Upgradable: -20% Threat
Upgradable: -1 sec cast time
Description: Drains X ammount of mana from a target. For each mana drained in this way, the target takes 0.5 damage.

Holy Fire (1 Rank Talent)

Level 25

Category: Nuke + DoT
Cast Time: 5 sec
Range: 30 yard
Cool Down: 1 min
Type: Holy
Upgradable: -20% Threat
Description: Consumes the enemy in flames that causes 128 to 164 Fire damage and an additional 36 Fire damage over 8 sec.

Mind Flay (1 Rank Talent)

Level 25

Category: Nuke + Snare
Cast Time: Instant
Duration: 3 sec
Range: 20 (24) yard
Type: Shadow Magic
Upgradable: -45% Threat
Upgradable: +20% Range
Upgradable: +6% Damage
Upgradable: -10% Chance to resist
Upgradable: +shadow vulnerablity debuff
Upgradable: +10% Chance to Stun for 3 sec
Upgradable: +40% Damage if in Shadowform
Description: Assault the target's mind with Shadow energy, causing 138 (146-202) damage over 3 sec and slowing the target to 55% of their movement speed.

Holy Nova (1 Rank Talent)

Level 40

Category: PBAoE Nuke/-Threat
Cast Time: Instant
Cool Down: 5 sec
Upgradable: -20% Threat
Upgradable: -10% Mana Cost
Description: Causes an explosion of holy light around the caster, causing 80 to 88 Holy damage to all targets within 10 yards. The effect also temporarily reduces your threat level against nearby targets for 5 sec.

Fade (6 Ranks)

Level 8

Category: Minus Agro
Cast Time: Instant
Duration: 10 (20) sec
Cool Down: 30 sec
Type: Shadow Magic
Upgradable: -10% Mana Cost
Upgradable: +10 seconds of duration
Description: Fade out, discouraging enemies from attacking you for 10 sec.

Dispel (2 Ranks)

Level 18

Category: Dispel
Cast Time: Instant
Range: 30 yard
Type: Discipline
Upgradable: -10% Mana Cost
Description: Dispels magic on the target, removing 1-2 harmful spells from a friend or 1-2 beneficial spells from an enemy..

Mind Vision

Level 22

Category: Bind Sight
Cast Time: Instant
Duration: 1 min
Range: 100 yard
Type: Shadow Magic
Upgradable: -10% Mana Cost
Description: Rank 1 Allows the Priest to see through the target's eyes for 1 min. Rank 2 Allows the Priest to see through the eyes of a party member for 1 min. Will not work if the target is in another instance or on another continent.

Levitate

Level 34

Category: Self Levitate
Cast Time: Instant
Duration: 1 min
Type: Discipline
Upgradable: -10% Mana Cost
Description: Allows the Priest to levitate, floating a few feet above the ground. While levitating, you will fall at a reduced speed and travel over water-like surfaces.

Silence (1 Rank Talent)

Level 35

Category: Debuff (Anti-Cast)
Cast Time: Instant
Duration: 5 sec
Range: 20 yard
Cool Down: 45 sec
Description: Silences the target, preventing them from casting spells for 5 sec.

Improved Holy Smite (3 Ranks)
Increases the critical strike damage of Holy Smite by

Level 10

Rank 1: 40%
Rank 2: 70%
Rank 3: 100%

Unbreakable Will (5 Ranks)
Increases chance to resist Stun, Fear, and Silence effects by

Level 10

Rank 1: 3%
Rank 2: 6%
Rank 3: 9%
Rank 4: 12%
Rank 5: 15%

Spirit Tap (5 Ranks)
Gives a chance to gain a 100% bonus to your Spirit after killing a target. For the duration, your Mana may regenerate at a 50% rate while casting. Lasts 15 sec.

Level 10

Rank 1: 20%
Rank 2: 40%
Rank 3: 60%
Rank 4: 80%
Rank 5: 100%

Holy Specialization (5 Ranks)
Increases the critical effect chance of Holy spells by

Level 10

Rank 1: 1%
Rank 2: 2%
Rank 3: 3%
Rank 4: 4%
Rank 5: 5%

Silent Resolve (5 Ranks)
Reduces the threat generated by damage spells by

Level 10

Rank 1: 4%
Rank 2: 8%
Rank 3: 12%
Rank 4: 16%
Rank 5: 20%

Blackout (5 Ranks)
Gives Psychic Scream & Shadow Damage spells a chance to stun the target for 3 sec.

Level 10

Rank 1: 2%
Rank 2: 4%
Rank 3: 6%
Rank 4: 8%
Rank 5: 10%

Subtlety (5 Ranks)
Reduces threat generated by healing spells by

Level 10

Rank 1: 4%
Rank 2: 8%
Rank 3: 12%
Rank 4: 16%
Rank 5: 20%

Improved Holy Word: Shield (3 Ranks)
Reduces duration of Holy Word: Shield's Weakened Soul effect by

Level 15

Rank 1: 5 seconds
Rank 2: 10 seconds
Rank 3: 15 seconds

Shadow Affinity (5 Ranks)
Reduces the threat generated by your Shadow spells by

Level 15

Rank 1: 5%
Rank 2: 10%
Rank 3: 15%
Rank 4: 20%
Rank 5: 25%

Spiritual Healing (5 Ranks)
Increases Mana regeneration rate by 50% after getting a critical effect from Flash Heal, Heal, Greater Heal, or Prayer of Healing. Lasts 10 sec. Mana will regenerate at these rates when casting:

Level 15

Rank 1: 10%
Rank 2: 20%
Rank 3: 30%
Rank 4: 40%
Rank 5: 50%

Improved Holy Word: Fortitude (2 Ranks)
Increases stamina buff by

Level 15

Rank 1: 15%
Rank 2: 30%

Improved Shadow Word: Pain (2 Ranks)
Increases the duration of Shadow Word: Pain by

Level 15

Rank 1: 3 sec
Rank 2: 6 sec

Inspiration (5 Ranks)
Increases target's armor value from items by X% for 15 sec after landing a critical heal

Level 15

Rank 1: 5%
Rank 2: 10%
Rank 3: 15%
Rank 4: 20%
Rank 5: 25%

Wand Specialization (5 Ranks)
Increases your damage with wands by

Level 15

Rank 1: 5%
Rank 2: 10%
Rank 3: 15%
Rank 4: 20%
Rank 5: 25%

Shadow Focus (5 Ranks)
Reduces your target's chance to resist your Shadow spells by

Level 15

Rank 1: 2%
Rank 2: 4%
Rank 3: 6%
Rank 4: 8%
Rank 5: 10%

Improved Resurrection (2 Ranks)
Reduces the resurrection sickness penalty caused by the spell by

Level 20

Rank 1: 10%
Rank 2: 25%

Martyrdom (2 Ranks)
After being hit with a critical strike, you have a chance to gain a 6 second buff that prevents you from loosing casting time when taking damage.

Level 20

Rank 1: 50%
Rank 2: 100%

Improved Fade (2 Ranks)
Increases the duration of Fade by

Level 20

Rank 1: 5 sec
Rank 2: 10 sec

Improved Renew (5 Ranks)
Increases the amount healed with Renew by

Level 20

Rank 1: 4%
Rank 2: 8%
Rank 3: 12%
Rank 4: 16%
Rank 5: 20%

Mental Agility (5 Ranks)
Reduces the mana cost of instant cast spells by

Level 20

Rank 1: 2%
Rank 2: 4%
Rank 3: 6%
Rank 4: 8%
Rank 5: 10%

Improved Mind Blast (5 Ranks)
Reduces the cooldown of Mind Blast by

Level 20

Rank 1: 0.5 sec
Rank 2: 1 sec
Rank 3: 1.5 sec
Rank 4: 2 sec
Rank 5: 2.5 sec

Holy Fire (1 Rank)
Gives New Nuke Spell

Level 25

Consumes the enemy in flames that causes 128 to 164 Fire damage and an additional 36 Fire damage over 8 sec.
Range: 30
Cool Down: 1 min
Cast Time: 5 sec

Inner Focus (1 Rank)
Gives New Buff Spell

Level 25

When activated, reduces the Mana cost of your next spell by 100% and increases its critical effect chance by 25% if it is capable of a critical effect.
Cast Time: Instant
Cool Down: 5 min

Improved Psychic Scream (2 Ranks)
Reduces the cooldown of your Psychic Scream spell by

Level 25

Rank 1: 2 sec
Rank 2: 4 sec

Improved Healing (5 Ranks)
Reduces the Mana cost of Lesser Heal, Heal, and Greater Heal spells by

Level 25

Rank 1: 2%
Rank 2: 4%
Rank 3: 6%
Rank 4: 8%
Rank 5: 10%

Meditation (5 Ranks)
Increases your Mana regeneration rate by .

Level 25

Rank 1: 2%
Rank 2: 4%
Rank 3: 6%
Rank 4: 8%
Rank 5: 10%

Shadow Weaving (5 Ranks)
Shadow damage spells have a chance to cause target to be vulnerable to Shadow damage by 4% and lasts 15 sec. Stacks up to 5 times. Chance is:

Level 25

Rank 1: 20%
Rank 2: 40%
Rank 3: 60%
Rank 4: 80%
Rank 5: 100%

Improved Flash Heal (2 Ranks)
Gives chance to avoid interruption caused by damage while casting Flash Heal.

Level 25

Rank 1: 35% chance
Rank 2: 70% chance

Improved Inner Fire (3 Ranks)
Increases the effects of your Inner Fire spell

Level 25

Rank 1: 15%
Rank 2: 30%
Rank 3: 45%

Mind Flay (1 Rank)
Gives New Nuke spell

Level 25

Assault the target's mind with Shadow energy, causing 138 damage over 3 sec and slowing the target to 55% of their movement speed.
Cast Time: Instant
Duration: 3 sec
Range: 20 yard

Improved Shadow Protection (2 Ranks)
Increases the amount of Shadow Resistance gained by

Level 30

Rank 1: 15%
Rank 2: 30%

Focused Casting (1 Rank)
Gives New Buff spell

Level 30

While active, you no longer lose casting time from taking damage. Lasts 8 sec.
Cast Time: Instant
Duration: 8 sec
Cool Down: 1 min

Shadow Reach (3 Ranks)
Increases the range of Shadow damage spells by

Level 25

Rank 1: 6%
Rank 2: 13%
Rank 3: 20%

Combat Resurrection (1 Rank)
Gives New Rez Spell

Level 30

Brings a dead player back to life with 50% of their health and mana. The target does not suffer from resurrection sickness.
Range: 40 yard
Cool Down: 45 min
Cast Time: 2 sec

Improved Shackle Undead (2 Ranks)
Lowers Shackle Undead resist chance by

Level 30

Rank 1: 5%
Rank 2: 10%

Vampiric Embrace (1 Rank)
Afflicts target with Shadow energy that causes all party members to be healed for 20% of any Shadow damage you deal for 1 minute

Level 30

Improved Prayer of Healing (2 Ranks)
Reduces the Mana cost of Prayer of Healing spell by

Level 30

Rank 1: 10%
Rank 2: 20%

Improved Mana Burn (2 Ranks)
Lowers cast time of Mana Burn by

Level 35

Rank 1: 0.5 sec
Rank 2: 1 sec

Silence (1 Rank)
Gives New Debuff Spell

Level 35

Silences the target, preventing them from casting spells for 5 sec.
Cast Time: Instant
Range: 20 yard
Duration: 5 sec
Cool Down: 45 sec

Master Healer (5 Ranks)
Increases the effectiveness of healing spells by

Level 35

Rank 1: 2%
Rank 2: 4%
Rank 3: 6%
Rank 4: 8%
Rank 5: 10%

Divine Spirit (1 Rank)
Gives New Buff spell

Level 40

Holy power infuses the target, increasing their Spirit by 23 for 30 min..
Cast Time: Instant
Duration: 30 min
Range: 30 yard

Darkness (5 Ranks)
Increases Shadow spell damage by

Level 35

Rank 1: 2%
Rank 2: 3%
Rank 3: 4%
Rank 4: 5%
Rank 5: 6%

Holy Nova (1 Rank)
Gives New PBAoE Nuke Spell

Level 40

Causes an explosion of holy light around the caster, causing 80 to 88 Holy damage to all targets within 10 yards. The effect also temporarily reduces your threat level against nearby targets for 5 sec.
Cast Time: Instant
Cool Down: 5 sec

Shadowform (1 Rank)
Active: Shapeshift + Buff

Level 40

Assume a Shadowform, increasing your Shadow damage by 20% and reducing Physical damage done to you by 20%. However you may only cast Shadow and Discipline spells while in this form..

Cast Time: Instant
Cool Down: 1.5 sec