There is a twitch promotion allowing you to get Purple Footprints Effect inventory icon.pngPurple Footprints EffectPurple Footprints EffectBoots Modifier
Stack Size: 20
Adds purple footprints to a pair of boots.Right click this item then left click some boots to apply it.
Purple Footprints Effect inventory icon.png
, Purple Weapon Effect inventory icon.pngPurple Weapon EffectPurple Weapon EffectWeapon Effect
Stack Size: 20
Adds a Purple effect to a weapon.Right click this item then left click a weapon to apply it.
Purple Weapon Effect inventory icon.png
and Purple Portal Effect inventory icon.pngPurple Portal EffectPurple Portal EffectPortal ModificationThis character's portals use a purple effect.Right click this to set or remove your Portal effect.Purple Portal Effect inventory icon.png if you have twitch prime.

Cast when Stunned Support

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Cast when Stunned SupportSupport, Spell, Trigger
Icon: !
Can store 1 use(s)
Cooldown Time: 0.25 sec
Requires Level 38Per 1% Quality:
0.5% increased Damage
(50-69)% chance to Cast Supported Spells when you are Stunned, or
Block a Stunning Hit
You cannot Cast Supported Triggerable Spells directly
This is a Support Gem. It does not grant a bonus to your character, but to skills in sockets connected to it. Place into an item socket connected to a socket containing the Active Skill Gem you wish to augment. Right click to remove from a socket.
Cast when Stunned Support inventory icon.png
Acquisition
Level: 38
Cast when Stunned is a support gem that causes a linked spell to trigger when the player is stunned.

Skill functions and interactions

Blocking: Block recovery animation for blocking a hit that would stun does count as actually being stunned.

Cast when Stunned targets the enemy which stunned the player. Spells that don't have targeting, like Discharge or Ice Nova, will be cast on the character as usual.

When the character is stunned, the chance to activate supported spells is rolled individually for each linked spell, then all the spells that succeeded this chance check will activate at once. Multipe copies of the same spell cannot activate at the same time, only one can, however linking multiple copies of the same spell increases the chance that at least one of them activates.

After that the global CwS cooldown occurs, which is currently 250ms. Getting stunned during cooldown time will not cause any supported spells to activate, even if you have multiple CwS groups.

Not Compatible with: Flame Totem

Gem level progression

LevelLvl.dexterityintelligenceCast
Chance
Exp.Total Exp.
138274050%00
240294151%388,734388,734
342304352%477,437866,171
444314553%583,7861,449,957
546334754%710,3592,160,316
648344955%1,355,5113,515,827
750355156%1,138,8774,654,704
852375357%1,368,2336,022,937
954385558%1,638,3387,661,275
1056395759%1,956,6489,617,923
1158415860%3,655,18413,273,107
1260426061%3,017,32716,290,434
1362436262%3,576,23219,866,666
1464446463%4,231,66724,098,333
1565456564%2,395,07826,493,411
1666466665%8,421,06334,914,474
1767466766%16,159,98351,074,457
1868476867%41,170,36792,244,824
1969486968%86,794,448179,039,272
2070487069%157,405,063336,444,335
2172507270%N/AN/A
2274N/AN/A71%N/AN/A
2376N/AN/A72%N/AN/A
2478N/AN/A73%N/AN/A
2580N/AN/A74%N/AN/A
2682N/AN/A75%N/AN/A
2784N/AN/A76%N/AN/A
2886N/AN/A77%N/AN/A
2988N/AN/A78%N/AN/A
3090N/AN/A79%N/AN/A

Strategy

Versus Cast when Damage Taken Support inventory icon.pngCast when Damage Taken SupportCast when Damage Taken SupportSupport, Spell, Trigger
Icon: !
Can store 1 use(s)
Cooldown Time: 0.25 sec
Requires Level 38Per 1% Quality:
0.5% increased Damage
Casts Supported Spells when you take a total of (528-3272) Damage
(-70-6)% more Damage
This Gem can only Support Skill Gems requiring Level (38-70) or lower
You cannot Cast Supported Triggerable Spells directly
This is a Support Gem. It does not grant a bonus to your character, but to skills in sockets connected to it. Place into an item socket connected to a socket containing the Active Skill Gem you wish to augment. Right click to remove from a socket.
Cast when Damage Taken Support inventory icon.png

Cast when Stunned has several advantages, which may tip its balance in its favour, depending on your character's build:

  • Characters who use energy shield or Mind over Matter will typically have more hit points than their Life pool (for purposes of stunning). This also results in more stuns per damage taken.
  • Unlike Cast when Damage Taken Support inventory icon.pngCast when Damage Taken SupportCast when Damage Taken SupportSupport, Spell, Trigger
    Icon: !
    Can store 1 use(s)
    Cooldown Time: 0.25 sec
    Requires Level 38Per 1% Quality:
    0.5% increased Damage
    Casts Supported Spells when you take a total of (528-3272) Damage
    (-70-6)% more Damage
    This Gem can only Support Skill Gems requiring Level (38-70) or lower
    You cannot Cast Supported Triggerable Spells directly
    This is a Support Gem. It does not grant a bonus to your character, but to skills in sockets connected to it. Place into an item socket connected to a socket containing the Active Skill Gem you wish to augment. Right click to remove from a socket.
    Cast when Damage Taken Support inventory icon.png
    , Cast when Stunned does not suffer a damage penalty at any level. However, it is usually still ineffective for damage-dealing purposes.
  • Most importantly, Cast when Stunned does not have a limit on active skill level. This makes it a better choice for level-dependent skills, since the trigger damage for Cast when Damage Taken Support inventory icon.pngCast when Damage Taken SupportCast when Damage Taken SupportSupport, Spell, Trigger
    Icon: !
    Can store 1 use(s)
    Cooldown Time: 0.25 sec
    Requires Level 38Per 1% Quality:
    0.5% increased Damage
    Casts Supported Spells when you take a total of (528-3272) Damage
    (-70-6)% more Damage
    This Gem can only Support Skill Gems requiring Level (38-70) or lower
    You cannot Cast Supported Triggerable Spells directly
    This is a Support Gem. It does not grant a bonus to your character, but to skills in sockets connected to it. Place into an item socket connected to a socket containing the Active Skill Gem you wish to augment. Right click to remove from a socket.
    Cast when Damage Taken Support inventory icon.png
    increases rapidly with level.

Quest reward

This skill is given as quest reward for the following quests:
ClassMarauderTemplarWitchShadowRangerDuelistScion
Quest
The Eternal Nightmare*The items are awarded for this quest when Dialla activates the device
Act 4
Cruel
no
no
yes
no
no
no
no

Vendor reward

This skill can be bought at the listed npc vendors after completing the following quests:
ClassMarauderTemplarWitchShadowRangerDuelistScion
Quest
The Eternal Nightmare*The items are awarded for this quest when Dialla activates the device
Act 4
Siosa
yes

Version history

Version Changes
2.4.0
  • Cast when Stunned now also triggers when blocking a hit that would stun.
1.2.2
  • Gems may now only be supported by a single trigger gem, gems supported by multiple trigger gems will be disabled.
1.0.2
  • Now has a 250ms cooldown.
1.0.0
  • Cast when Stunned has been added to the game.