Cast while Channelling Support

Cast while Channelling SupportSupport, Channelling, Spell
Icon: W
Mana Multiplier: 140%Requires Level 38Must support both a channelling skill and a non-channelling spell skill to work. The channelling skill will trigger a spell periodically while channelling. Cannot support totems, traps, or mines. Vaal skills and skills that reserve mana cannot be triggered.Per 1% Quality:
Supported Skills deal 0.5% increased DamageTrigger a Supported Spell every (0.45-0.35) seconds while Channelling Supported Skills
You cannot Cast Supported Triggerable Spells directly
Supported Skills deal (0-9)% more DamageThis 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.Acquisition
Level: 38Purchase Costs

Normal

1x Orb of Alchemy

Sell Price
1x Scroll Fragment

Cast while Channelling Support is a support gem that casts linked spells while casting the linked channelling skills.

Skill functions and interactions

• Triggered Spell Priority: Cast while Channelling follows the same restrictions as other trigger support gems such as Cast On Critical Strike SupportCast On Critical Strike SupportSupport, Spell, Trigger
  Icon: &
  Mana Multiplier: 140%
  Can store 1 use(s)
  Cooldown Time: 0.50 secRequires Level 38Must support both an attack skill and a spell skill to work. The attack skill will trigger a spell when it critically strikes an enemy. Cannot support totems, traps, or mines. Vaal skills and skills that reserve mana cannot be triggered.Per 1% Quality:
  Supported Skills have 1% increased Critical Strike ChanceSupported Attacks will Trigger a Supported Spell when you Crit an Enemy
  Supported Skills deal (20-39)% more Spell Damage
  You cannot Cast Supported Triggerable Spells directlyThis 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., in that only one spell can be triggered per event. If multiple Spells are linked, the spells will cycle based on the order in which they are socketed.
• Casting Interval: Unlike Cast On Critical Strike SupportCast On Critical Strike SupportSupport, Spell, Trigger
  Icon: &
  Mana Multiplier: 140%
  Can store 1 use(s)
  Cooldown Time: 0.50 secRequires Level 38Must support both an attack skill and a spell skill to work. The attack skill will trigger a spell when it critically strikes an enemy. Cannot support totems, traps, or mines. Vaal skills and skills that reserve mana cannot be triggered.Per 1% Quality:
  Supported Skills have 1% increased Critical Strike ChanceSupported Attacks will Trigger a Supported Spell when you Crit an Enemy
  Supported Skills deal (20-39)% more Spell Damage
  You cannot Cast Supported Triggerable Spells directlyThis 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., the listed interval is not a cooldown. Cast while Channelling casts the trigger spell exactly on the listed interval regardless of the cast time of the channeled spell.
• Spell Totem SupportSpell Totem SupportSupport, Totem, Duration
  Icon: T
  Mana Multiplier: 200%Requires Level 8Supports spell skills that do not reserve mana. Instead of using that skill, you will summon a totem that uses the skill for you.Per 1% Quality:
  1% increased Totem Placement speedSummons a Totem which uses the Supported Skill
  Totem lasts 8 seconds
  Supported Skills deal (35-26)% less Damage
  Spells Cast by Totem have 30% less Cast SpeedThis 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 while Channelling cannot support a skill gem that is supported by Spell Totem Support gem.
• Detonate DeadDetonate DeadCast, AoE, Fire
  Radius: 22
  Mana Cost: (7 to 30)
  Cast Time: 0.80 sec
  Critical Strike Chance: 5.00%Requires Level 4Explodes an unused corpse, dealing fire damage to nearby enemies.Per 1% Quality:
  1% increased Cast SpeedExplosion deals base Fire Damage equal to 6% of the corpse's maximum Life
  Deals (4-276) to (5-414) Fire Damage
  Damage cannot be ReflectedPlace into an item socket of the right colour to gain this skill. Right click to remove from a socket.: Despite this skill lacking the spell keyword, Detonate Dead can be triggered with a channelled skill while linked with Cast while Channelling.
• Lightning TendrilsLightning TendrilsSpell, AoE, Lightning
  Radius: 22
  Mana Cost: (6 to 26)
  Cast Time: 0.80 sec
  Critical Strike Chance: 6.00%
  Damage Effectiveness: 35%Lightning is released from your hands four times in quick succession, damaging all enemies in an arc in front of you.Per 1% Quality:
  1% increased Lightning DamageDeals (1-24) to (3-461) Lightning Damage
  +(0-6) to radiusPlace into an item socket of the right colour to gain this skill. Right click to remove from a socket.: As with other trigger supports (Cast when Damage Taken SupportCast when Damage Taken SupportSupport, Spell, Trigger
  Icon: !
  Can store 1 use(s)
  Cooldown Time: 0.25 secRequires Level 38Each supported spell skill will track damage you take, and be triggered when the total damage taken reaches a threshold. Cannot support totems, traps, or mines. Vaal skills and skills that reserve mana cannot be triggered.Per 1% Quality:
  Supported Skills deal 0.5% increased DamageTrigger Supported Spells when you take a total of (528-3272) Damage
  Supported Skills deal (-70-6)% more Damage
  This Gem can only Support Skill Gems requiring Level (38-70) or lower
  You cannot Cast Supported Triggerable Spells directlyThis 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 On Critical Strike SupportCast On Critical Strike SupportSupport, Spell, Trigger
  Icon: &
  Mana Multiplier: 140%
  Can store 1 use(s)
  Cooldown Time: 0.50 secRequires Level 38Must support both an attack skill and a spell skill to work. The attack skill will trigger a spell when it critically strikes an enemy. Cannot support totems, traps, or mines. Vaal skills and skills that reserve mana cannot be triggered.Per 1% Quality:
  Supported Skills have 1% increased Critical Strike ChanceSupported Attacks will Trigger a Supported Spell when you Crit an Enemy
  Supported Skills deal (20-39)% more Spell Damage
  You cannot Cast Supported Triggerable Spells directlyThis 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., etc.), Lightning Tendrils cannot be supported with Cast while Channeling due to its mock channelling nature.

Gem level progression

Level				Casting Interval	more Damage	Exp.	Total Exp.
1	38	27	40	0.45s	N/A	0	0
2	40	29	41	0.44s	N/A	388,734	388,734
3	42	30	43	0.44s	1%	477,437	866,171
4	44	31	45	0.43s	1%	583,786	1,449,957
5	46	33	47	0.43s	2%	710,359	2,160,316
6	48	34	49	0.42s	2%	1,355,511	3,515,827
7	50	35	51	0.42s	3%	1,138,877	4,654,704
8	52	37	53	0.41s	3%	1,368,233	6,022,937
9	54	38	55	0.41s	4%	1,638,338	7,661,275
10	56	39	57	0.4s	4%	1,956,648	9,617,923
11	58	41	58	0.4s	5%	3,655,184	13,273,107
12	60	42	60	0.39s	5%	3,017,327	16,290,434
13	62	43	62	0.39s	6%	3,576,232	19,866,666
14	64	44	64	0.38s	6%	4,231,667	24,098,333
15	65	45	65	0.38s	7%	2,395,078	26,493,411
16	66	46	66	0.37s	7%	8,421,063	34,914,474
17	67	46	67	0.37s	8%	16,159,983	51,074,457
18	68	47	68	0.36s	8%	41,170,367	92,244,824
19	69	48	69	0.36s	9%	86,794,448	179,039,272
20	70	48	70	0.35s	9%	157,405,063	336,444,335
21	72	50	72	0.35s	10%	N/A	N/A
22	74	N/A	N/A	0.34s	10%	N/A	N/A
23	76	N/A	N/A	0.34s	11%	N/A	N/A
24	78	N/A	N/A	0.33s	11%	N/A	N/A
25	80	N/A	N/A	0.33s	12%	N/A	N/A
26	82	N/A	N/A	0.32s	12%	N/A	N/A
27	84	N/A	N/A	0.32s	13%	N/A	N/A
28	86	N/A	N/A	0.31s	13%	N/A	N/A
29	88	N/A	N/A	0.31s	14%	N/A	N/A
30	90	N/A	N/A	0.3s	14%	N/A	N/A

Quest reward

This skill is not given as quest reward.

Vendor reward

This skill can be bought at the listed npc vendors after completing the following quests:

Class	Marauder	Templar	Witch	Shadow	Ranger	Duelist	Scion
Quest
The Eternal Nightmare*The items are awarded for this quest when Dialla activates the device Act 4 Petarus and Vanja
Fallen from Grace Act 6 Lilly Roth

Version history

Version	Changes
2.5.0	Introduced to the game.