Cast speed

Cast speed is a modifier that affects the speed of casting spells.

Cast speed can be found throughout the game, on passive skills, equipment, skill gems, monster affixes, map affixes, and so on.

The base cast time is derived from the spell being used, it is the length of time required to cast a spell. Cast speed is a derived stat which is equal to 1 divided by Cast Time. Therefore if the cast speed is increased, the cast time is reduced. For example, if a player is using a skill with a base cast time of 0.8 seconds, and the player has a total of 50% increased Cast Speed, the result will be:

           1 / 0.8 = 1.25 casts per second (base)
1.25 * ( 1 + 0.5 ) = 1.88 casts per second (modified)
          1 / 1.88 = Modified cast time of 0.53 seconds

Frenzy charges increase cast speed by 5% per charge.

Passives

There are passive skill nodes that grant increased cast speed or a combination of bonuses including cast speed.

Cast Speed

These passives increase cast speed of all spells by a percentage.

Cast Speed

Passive Skill

(2-3)% increased Cast Speed [1]

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3% increased Cast Speed [1] [2] [3]

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4% increased Cast Speed [1] [2] [3] [4] [5] [6] [7] [8]

Cast Speed is a small passive skill that grants increased cast speed.

Version history

Version	Changes
1.3.0	The Templar, Marauder, and Duelist starting areas have been reworked significantly. Cast speed in the Witch and Shadow starting areas has been reduced.
1.2.0	The area surrounding the Witch, Shadow and Ranger has been redesigned.
1.1.0	Improvements have been made to early cast speed passives in the Witch and Shadow sections.

Nimbleness

Notable Passive Skill

8% increased Cast Speed
+15% to Critical Strike Multiplier for Spell Damage [1]

Nimbleness is a notable passive skill that grants increased cast speed and additional critical strike multiplier for spells.

Anointment

Blight anointment to unlock the passive:

Oil #1	Oil #2	Oil #3	Outcome
Amber Oil	Crimson Oil	Crimson Oil	Nimbleness	8% increased Cast Speed +15% to Critical Strike Multiplier for Spell Damage

Version history

Version	Changes
3.16.0	[Undocumented This change was not documented by any official sources. It was discovered through player testing or datamining.] Now grants 8% increased Cast Speed (up from 6%) and +15% to Critical Strike Multiplier for Spells (up from 12%). No longer grants 4% increased Movement Speed or 15% chance to Avoid interruption from Stuns while Casting.
2.0.0	Also provides 4% increased Movement Speed and 15% chance to Avoid interruption from Stuns while Casting in addition to 6% increased Cast Speed.

Heart of Thunder

Notable Passive Skill

30% increased Lightning Damage
Damage Penetrates 6% Lightning Resistance [1]

Heart of Thunder is a notable passive skill that grants increased lightning damage and additional penetration against lightning resistance.

Anointment

Blight anointment to unlock the passive:

Oil #1	Oil #2	Oil #3	Outcome
Sepia Oil	Azure Oil	Golden Oil	Heart of Thunder	30% increased Lightning Damage Damage Penetrates 6% Lightning Resistance

Version history

Version	Changes
3.16.0	[Undocumented This change was not documented by any official sources. It was discovered through player testing or datamining.] Now grants 30% increased Lightning Damage (up from 25%). No longer grants 0.2% of Lightning Damage Leeched as Energy Shield.
3.6.0	Now grants 0.2% of Lightning Damage Leeched as Energy Shield.
3.3.0	Now grants Damage Penetrates 6% Lightning Resistance (up from 3%).
2.0.0	Now grants Damage Penetrates 3% Lightning Resistance (up from 2%).
1.2.0	Lightning Weaver renamed to Heart of Thunder. Heart of Thunder also grants lightning resistance penetration, but no longer grants cast speed. The area surrounding the Witch, Shadow and Ranger has been redesigned. Many values have been adjusted.

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Cast Speed for Curses

These passives increase cast speed of curses by a percentage.

Curse Cast Speed

Passive Skill

Curse Skills have 10% increased Cast Speed [1] [2] [3] [4] [5]

Curse Cast Speed is a small passive skill that grants increased cast speed for curses.

Version history

Version	Changes
1.2.0	The area surrounding the Witch, Shadow and Ranger has been redesigned.

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