Vaal Power Siphon

Vaal Power SiphonVaal, Attack, Projectile
Souls Per Use: 15 (N) /
Can Store 2 Use(s)
Soul Gain Prevention: 4.000 sec
Cast Time: 1.00 sec
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:
1% increased DamageDeals (150-184.2)% of Base 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 0 Projectile
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
Level: 12Sell Price
1x Scroll FragmentMiscellaneous
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 Lesser Multiple Projectiles SupportLesser Multiple Projectiles SupportSupport, Projectile
Icon: l
Mana Multiplier: 140%Requires Level 8Supports projectile skills.Per 1% Quality:
Supported Skills have 0.5% increased Attack Speed
Supported Skills have 0.5% increased Cast SpeedSupported Skills fire 2 additional Projectiles
Supported Skills deal (25-16)% 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. or Greater Multiple Projectiles SupportGreater Multiple Projectiles SupportSupport, Projectile
Icon: P
Mana Multiplier: 165%Requires Level 38Supports projectile skills.Per 1% Quality:
Supported Skills have 0.5% increased Attack Speed
Supported Skills have 0.5% increased Cast SpeedSupported 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. do not have any effect despite reducing damage. Other support gems, such as Chain SupportChain SupportSupport, Chaining, Projectile
Icon: c
Mana Multiplier: 150%Requires Level 38Supports projectile skills, and any other skills that chain.Per 1% Quality:
Supported Skills have 1% increased Projectile SpeedSupported 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	Damage Multiplier	Exp.	Total Exp.
1	12	33	150%	150%	0	0
2	15	39	152%	151.8%	15,249	15,249
3	19	48	154%	153.6%	41,517	56,766
4	23	56	155%	155.4%	81,983	138,749
5	27	64	157%	157.2%	147,968	286,717
6	31	73	159%	159%	250,557	537,274
7	35	81	161%	160.8%	405,086	942,360
8	38	88	163%	162.6%	447,718	1,390,078
9	41	94	164%	164.4%	615,318	2,005,396
10	44	100	166%	166.2%	834,639	2,840,035
11	47	106	168%	168%	1,570,760	4,410,795
12	50	113	170%	169.8%	1,633,987	6,044,782
13	53	119	172%	171.6%	2,151,030	8,195,812
14	56	125	173%	173.4%	2,812,189	11,008,001
15	59	132	175%	175.2%	5,099,360	16,107,361
16	62	138	177%	177%	9,400,731	25,508,092
17	64	142	179%	178.8%	15,273,366	40,781,458
18	66	146	181%	180.6%	26,286,582	67,068,040
19	68	151	182%	182.4%	62,890,590	129,958,630
20	70	155	184%	184.2%	212,046,017	342,004,647
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 (Q20)	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 (Q20)	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

Version History

Version	Changes
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.