Vaal Power Siphon

Vaal Power SiphonVaal, Attack, Projectile
Level: (1-20)
Souls Per Use: 15
Can Store 2 Use(s)
Attack Damage: (150-184)% of base
Effectiveness of Added Damage: (150-184)%Requires Level 12Fires your wand simultaneously at all nearby enemies, culling those close to death and granting you a power charge for each. Cannot be supported by Volley.Per 1% Quality:1Superior1% increased DamageDeals (150-184.2)% of Base Attack Damage
Gain a Power Charge when Projectile Hits a Rare or Unique Enemy
+10% to Critical Strike Multiplier per Power Charge
20% increased Critical Strike Chance per Power Charge
Fires Projectiles at each nearby Enemy
Can't be Evaded
Culling Strike
CorruptedPlace into an item socket of the right colour to gain this skill. Right click to remove from a socket.Acquisition
Area level: 12Vendor Offer
1x Scroll FragmentMetadata
Item class: Active Skill Gems
Metadata ID: Metadata/Items/Gems/SkillGemVaalPowerSiphon

For the non-Vaal counterpart, see Power Siphon.

Vaal Power Siphon is a vaal projectile attack that fires a single wand projectile at each nearby enemy, granting a power charge for any slain by it.

Skill Functions and Interactions

Vaal Power Siphon fires one projectile at each enemy, meaning that if 20 enemies are present, adding Lesser Multiple Projectiles will cause 60 total projectiles to be fired. However each set of projectiles is able only to hit the enemy it targeted, and only with a single projectile. This means that additional projectiles created by support gems such as Greater Multiple Projectiles SupportGreater Multiple Projectiles SupportSupport, Projectile
Icon: P
Level: (1-20)
Cost & Reservation Multiplier: 150%Requires Level 38Supports projectile skills.Per 1% Quality:1Superior2Anomalous3DivergentSupported Skills deal 0.5% increased Projectile DamageSupported Skills have 1% reduced Mana Cost
Supported Skills have 0.5% increased Projectile SpeedProjectiles Fired by Supported Skills have 1% increased Projectile spreadSupported Skills fire 4 additional Projectiles
Supported Skills deal (35-26)% less Projectile 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. and Barrage SupportBarrage SupportBow, Attack, Support, Projectile
Icon: N
Level: (1-20)
Cost & Reservation Multiplier: 150%Requires Level 38Supports projectile attack skills that use bows or wands. Cannot support triggered skills, channelled skills, or skills that create Minions.Per 1% Quality:1Superior2Anomalous3DivergentSupported Skills have 0.5% increased Attack SpeedProjectiles from Supported Skills Pierce 0.1 additional TargetsProjectiles Fired by Supported Skills have 5% increased Projectile spreadSupported Skills fire 3 additional Projectiles
Supported Skills deal (68-62)% less Damage
Supported Skills have 5% more Attack Time per Projectile
Supported Skills have 5% more Trap and Mine Throwing Time per Projectile
Supported Skills Fire Projectiles sequentially
Supported Skills can only be used with Bows or WandsThis 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. do not have any effect despite reducing damage. Other support gems, such as Chain SupportChain SupportSupport, Chaining, Projectile
Icon: c
Level: (1-20)
Cost & Reservation Multiplier: 150%Requires Level 38Supports projectile skills, and any other skills that chain.Per 1% Quality:1Superior2Anomalous3DivergentSupported Skills have 1% increased Chaining rangeSupported Skills have 1% increased Projectile SpeedProjectiles Fired by Supported Skills have 4% chance not to Pierce EnemiesSupported Skills Chain +2 times
Supported Skills deal (30-11)% less Damage with HitsThis 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., do result in each projectile being able to hit more than one target.

In terms of the range meant by "nearby" enemies, Vaal Power Siphon will target at least all enemies onscreen. This is an AoE calculation, so projectile speed does not affect the effective range.

Gem level progression

Level			Damage Effectiveness	Attack Damage	Exp.	Total Exp.
1	12	33	150%	150%	0	0
2	15	39	152%	151.8%	15249	15249
3	19	48	154%	153.6%	41517	56766
4	23	56	155%	155.4%	81983	138749
5	27	64	157%	157.2%	147968	286717
6	31	73	159%	159%	250557	537274
7	35	81	161%	160.8%	405086	942360
8	38	88	163%	162.6%	447718	1390078
9	41	94	164%	164.4%	615318	2005396
10	44	100	166%	166.2%	834639	2840035
11	47	106	168%	168%	1570760	4410795
12	50	113	170%	169.8%	1633987	6044782
13	53	119	172%	171.6%	2151030	8195812
14	56	125	173%	173.4%	2812189	11008001
15	59	132	175%	175.2%	5099360	16107361
16	62	138	177%	177%	9400731	25508092
17	64	142	179%	178.8%	15273366	40781458
18	66	146	181%	180.6%	26286582	67068040
19	68	151	182%	182.4%	62890590	129958630
20	70	155	184%	184.2%	212046017	342004647
21	72	159	186%	186%	N/A	N/A
22	74	N/A	188%	187.8%	N/A	N/A
23	76	N/A	190%	189.6%	N/A	N/A
24	78	N/A	191%	191.4%	N/A	N/A
25	80	N/A	193%	193.2%	N/A	N/A
26	82	N/A	195%	195%	N/A	N/A
27	84	N/A	197%	196.8%	N/A	N/A
28	86	N/A	199%	198.6%	N/A	N/A
29	88	N/A	200%	200.4%	N/A	N/A
30	90	N/A	202%	202.2%	N/A	N/A
31	91	N/A	203%	203.1%	N/A	N/A
32	92	N/A	204%	204%	N/A	N/A
33	93	N/A	205%	204.9%	N/A	N/A
34	94	N/A	206%	205.8%	N/A	N/A
35	95	N/A	207%	206.7%	N/A	N/A
36	96	N/A	208%	207.6%	N/A	N/A
37	97	N/A	209%	208.5%	N/A	N/A
38	98	N/A	209%	209.4%	N/A	N/A
39	99	N/A	210%	210.3%	N/A	N/A
40	100	N/A	211%	211.2%	N/A	N/A

Item acquisition

Upgrade paths

This item can be acquired through the following upgrade paths or vendor recipes:

Amount	Ingredient	General Notes	Type
9	Volatile PowerVolatile Power9Superior Vaal Gem Quality: +20% CorruptedUnlimited power is apt to corrupt the minds of those who possess it.	random corrupted superior Vaal gem with 20% quality	Automatic
1	Gemcutter's IncubatorGemcutter's IncubatorAdds an incubated Quality Gem item to an equippable item Item drops after killing # monstersQuality GemRight click this item then left click an item to apply it. The Incubated item drops after killing a specific number of monsters.	random superior gem	Automatic
6	The FoxThe Fox6Level 20 Gem"Masters of wit, strength and cunning. To survive the harsh winters, you must be like the fox." - Ezomyte Proverb	random level 20 gem	Automatic
3	Gemcutter's PromiseGemcutter's Promise3Superior Gem Quality: +20%"I swore to use my position to help the people. What good is power when it just accumulates on the already-powerful?" - Erasmus, Imperial Gemcutter	random superior gem with 20% quality	Automatic
1	The VoidThe Void1Reach into the Void and claim your prize.	random divination card set exchange	Automatic

Alternate skill effects

Vaal Power Siphon has the following alternate skill effects:

Item	Effect(s)
Celestial Power Siphon EffectCelestial Power Siphon EffectSkill Gem EffectYour Power Siphon becomes a celestial effect.	Your Power Siphon becomes a celestial effect.

Version history

Version	Changes
3.14.0	Now grants +25% to Critical Strike Multiplier per Power Charge (previously +10%). Now grants 50% increased Critical Strike Chance per Power Charge (previously 20%). Now stores up to 3 uses (previously 2). Now has a Soul Gain Prevention duration of 2 seconds (previously 4).
3.1.0	Radius has been reduced to 70 units (down from 120).
1.1.0d	Vaal Skill soul counts were initially balanced for Merciless difficulty, where there are more monsters. We want them to be easier to use in Normal and Cruel difficulty. We have halved the number of souls required for each skill. In Cruel difficulty, skills require 50% more souls to uses. In Merciless difficulty, they require 100% more (which is the same as before the patch).
1.1.0	Introduced to the game.