Proc

A Proc is an enchantment associated with a weapon that grants it a five percent chance of discharging spell-damage, bleeding over time, poison damage over time, health drain, or stamina damage. "Proc" is short for "programmed random occurrence".

Mechanics

A proc only has a chance to fire on attacks that successfully strike the target with the original physical damage; however, a discharge from a proc will never miss. The damage of a proc discharge is determined using the spell damage formula, associated primarily with intelligence. Procs are also affected by power damage modifiers such as the Doomsayer power, "Vengeance of the Pit".

Tiers of Strength

Procs are classified into three and sometimes four different tiers of damage or effectiveness (however, they will always fire at a rate of 5%). Tier one, or "T1" procs offer the lowest damage and are usually undesirable as a suffix enchantment because there are better ones available. However, prefix enchantments only offer T1 procs (e.g. "Icy Poinard") and are sometimes sought-after. Second tier or "T2" procs are available as suffixes on weapons only and are the most common procs found on random drops. Third tier or "T3" procs are the most powerful that are widely available, and are available only in a suffix . T3 procs offer the highest damage or effectiveness for the proc mechanic that players may enchant on their weapons. Fourth tier or "T4" procs are only available on special weapons that were handed out during Feature Character events, which have been discontinued.

Damage Types

Procs are available in many different damage types, all of which can be resisted and exposed. For example, a Necromancer would experience higher proc damage using unholy procs if he was to cast "Unholy Fright", an unholy exposure debuff, beforehand. Alternatively, if the unholy procs were used on a Shade or a Vampire, the damage would be reduced, as these races have increased resistance to this damage type.

Tier Names

Damage Type	Tier 1	Tier 2	Tier 3	Found on Vendor	Minimum Damage	Maximum Damage
Health Drain	"of the Leech"	"of the Lamprey"	"of the Vampyre"	No Data	25	25
Fire	"of Crackling"	"of Embers"	"of Fire"	No Data	15	51
Lightning	"of Lightning"	"of Storm"	"of Thunderbolts"	No Data	13	53
Stamina Damage	"Massive"(prefix) & "Of Overwhelming" (suffix)	"of Exhausing"	"of Subduing"	No Data	5	12
Poison	"of Poison"	"of Venom"	"of the Fang"	No Data	4	7
Poison Blade (Assassin)	N/A	N/A	N/A	N/A	21	45
Cold	"Icy" (prefix) & "of Ice" (suffix)	"of Frost"	"of Frykka"	No Data	13	53
Unholy	No Data	No Data	"of Oblivion"	Shade, Vampire	13	53
Mental	"of the Mind"	"of the Warlock"	"of the Mentalist"	No Data	20	46
Bleeding	"of Cuts" & "of Burrs"	"of Briars" & "of Claws"	"of Bloodletting"	No Data	3	8
Magic	"of Wode" or "of Silver"	"of the Dryads" or "of the Spriggan"	"of the Fey"	No Data	18	48
Holy	No Data	"of the Just"	"of Truth"	Human, Vampire	13	53
Holy Blade (Crusader, Nightstalker)	N/A	N/A	N/A	N/A	17	50

Sources

There are a few ways to obtain a proc:

• Crafted into suffix and/or prefix of a weapon enchantment
• Casted upon it by a Crusader's "consecrate weapon"
• Casted upon it by a Nightstalker's "annoint blade"
• Casted upon it by an Assassin's "poison blade"
• Casted upon it by an Undead Hunter's "consecrate weapon"

While enchantments to weapons are permanent procs, those which were casted to a weapon by another player will expire after a predetermined amount of time. To know how long a casted proc has remaining, one can hover over the weapon in the equip window.