Wikia

Exorcism
Exorcism 30 yd range 15 sec cooldown 8% of base mana 1.5 sec cast Causes [X + 0.15 * SPH + 0.15 * AP] to [Y + 0.15 * SPH + 0.15 * AP] Holy damage to an enemy target. If the target is Undead or Demon, it will always critically hit.
Usable by
Class	Paladin
Properties
Type	Offensive
School	Holy
Cooldown	15 sec
Talents
Improvement talents	The Art of War, Holy Power, Purifying Power, Vengeance
Other information
Ranks	9

"LIGHT TAKE YOU, BEAST!" - Inquisitor Hallard

Exorcism is a Holy direct damage paladin spell that always crits on an Undead or Demonic target.

Rank table

Rank	Level	Coefficient	Cost
1	20	96 - 110	40
2	28	173 - 195	90
3	36	250 - 282	1 40
4	44	350 - 394	2 20
5	52	452 - 506	3 40
6	60	564 - 628	4 60
7	68	687 - 765	10
8	73	787 - 877	20
9	79	1028 - 1146	20

Improvements

Talents

Holy

[Purifying Power] reduces the cooldown by 10/33%.
[Holy Power] increases the critical effect chance of all Holy spells by 5%.
[Divine Illumination] reduces the mana cost of all spells by 50% for 15 sec.

Protection

[Touched by the Light] increases your spell power by an amount equal to 10/20/30% of your Strength and increases the amount healed by your critical heals by 10/20/30%.

Retribution

[Conviction] increases the critical strike chance of all your spells by 1/2/3/4/5%.
[Vindication] gives the Paladin's damaging attacks a chance to reduce the target's attack power for 10 seconds. The amount scales with the Paladin's level.
[Sanctity of Battle] increases damage done by 5/10/15% and chance to crit with all spells by 1/2/3%.
[Crusade] increases the damage of all your spells by 1/2/3% and an additional 1/2/3% against Humanoids, Demons, Undead and Elementals.
[Sanctified Retribution] increases the damage of all your spells by 3%.
[Vengeance] gives a bonus to holy damage after dealing a critical strike with a weapon swing, spell or ability.
[The Art of War] reduces the cast time of Exorcism to instant (2/2, otherwise it reduced cast time by 0.75sec) when you critically hit your target with a melee swing.

Glyphs

[Glyph of Exorcism] increases damage done by 20%.

Specific equipment

[Libram of Wracking] increases the spell power of your Exorcism and Holy Wrath spells by 120.

Equipment sets

Valorous Aegis Battlegear - 2/5 increases the damage done by your Exorcism and Hammer of Wrath abilities by 10%.

Tips and tricks

Amount of damage dealt by Exorcism is increased by 15% of your attack power and 15% of your Spell power.
Exorcism is one of the few ranged attacks available to Paladins.

Patch changes

Patch 3.2.0 (04-Aug-2009): Now has a 1.5 second cast time, but can once again be used on players.
Patch 3.1.1a (2009-04-28): "..fix[ed] the tooltip to display the appropriate text; it also displays an error message when a player tries to use it against other players."
Patch 3.1.1 (2009-04-21): "..the paladin ability Exorcism cannot damage other players, but the player game client does not display this change properly."
Patch 3.1.0 (14-Apr-2009): Exorcism: Now can be used on any target and has a 100% chance to be a critical strike when used on Undead and Demons.

This is to ensure that paladins do not see a drop in their dps when progressing from Naxxramas (which is full of undead) to Ulduar and beyond (not as much undead). Due to this change, [Glyph of Exorcism] was changed to 20% bonus damage.