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 skills used by 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 Triggered Spells 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 FragmentMiscellaneous
Item class: Support Skill Gems
Metadata ID: Metadata/Items/Gems/SupportGemCastWhileChannelling

Cast while Channelling Support is a support gem that casts linked spells while the player is casting 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
  Icon: T
  Mana Multiplier: 200%Requires Level 8Supports spell skills that are not triggered. Instead of casting that spell, you will summon a totem that casts the spell 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.

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
31	91	N/A	N/A	0.3s	14%	N/A	N/A
32	92	N/A	N/A	0.3s	15%	N/A	N/A
33	93	N/A	N/A	0.3s	15%	N/A	N/A
34	94	N/A	N/A	0.29s	15%	N/A	N/A
35	95	N/A	N/A	0.29s	15%	N/A	N/A
36	96	N/A	N/A	0.29s	16%	N/A	N/A
37	97	N/A	N/A	0.29s	16%	N/A	N/A
38	98	N/A	N/A	0.28s	16%	N/A	N/A
39	99	N/A	N/A	0.28s	16%	N/A	N/A
40	100	N/A	N/A	0.28s	17%	N/A	N/A

Item acquisition

Vendor reward

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

Class →	Witch	Shadow	Ranger	Duelist	Marauder	Templar	Scion
Quest ↓
The Eternal Nightmare Act 4 Petarus and Vanja	✓
Fallen from Grace Act 6 Lilly Roth	✓

Version history

Version	Changes
2.5.0	Introduced to the game.