Contagion

ContagionSpell, AoE, Duration, Chaos
Level: (1-20)
Cost: (5-20) Mana
Cast Time: 0.60 sec
Radius: 20Unleashes a vile contagion on enemies, dealing chaos damage over time. If an enemy dies while affected by Contagion, it spreads to other enemies.Per 1% Quality:1Superior2Anomalous3Divergent0.5% increased Area of Effect3% increased Chaos Damage3% chance to Spread when affected Enemy is HitDeals (3.5-235.9) Base Chaos Damage per second
Base duration is 5 seconds
Modifiers to Spell Damage apply to this Skill's Damage Over Time effectPlace into an item socket of the right colour to gain this skill. Right click to remove from a socket.Acquisition
Area level: 5Vendor Prices

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1x Scroll of Wisdom

Vendor Offer
1x Scroll FragmentMetadata
Item class: Active Skill Gems
Metadata ID: Metadata/Items/Gems/SkillGemContagion

Contagion is a chaos spell that applies a chaos damage over time effect to all enemies in the area, and spreads itself when an enemy dies. Contagion interacts favourably with Essence DrainEssence DrainSpell, Projectile, Duration, Chaos, AoE
Level: (1-20)
Cost: (8-23) Mana
Cast Time: 0.70 sec
Critical Strike Chance: 5.00%
Effectiveness of Added Damage: 60%Requires Level 12Fires a projectile that applies a damage over time debuff when it hits. You are healed for a portion of the debuff damage. The debuff is spread by Contagion.Per 1% Quality:1Superior2Anomalous3Divergent1% increased Chaos DamageRegenerate 0.01% of Debuff Damage as Life5% increased Damage with HitsDeals (31.2-1503.2) Base Chaos Damage per second
Regenerate 0.5% of Debuff Damage as Life
Base duration is 3.8 seconds
Deals (9-433) to (14-649) Chaos Damage
Modifiers to Spell Damage apply to this Skill's Damage Over Time effectPlace into an item socket of the right colour to gain this skill. Right click to remove from a socket., a skill that deals heavy chaos damage over time and is spread by Contagion.

Skill functions and interactions

• Modifiers to Spell Damage apply to this skill's Damage Over Time Effect: Modifiers to spell damage only affect the damage over time effect of Contagion granted by the gem and do not affect other sources of damage over time caused by the skill.
• Essence DrainEssence DrainSpell, Projectile, Duration, Chaos, AoE
  Level: (1-20)
  Cost: (8-23) Mana
  Cast Time: 0.70 sec
  Critical Strike Chance: 5.00%
  Effectiveness of Added Damage: 60%Requires Level 12Fires a projectile that applies a damage over time debuff when it hits. You are healed for a portion of the debuff damage. The debuff is spread by Contagion.Per 1% Quality:1Superior2Anomalous3Divergent1% increased Chaos DamageRegenerate 0.01% of Debuff Damage as Life5% increased Damage with HitsDeals (31.2-1503.2) Base Chaos Damage per second
  Regenerate 0.5% of Debuff Damage as Life
  Base duration is 3.8 seconds
  Deals (9-433) to (14-649) Chaos Damage
  Modifiers to Spell Damage apply to this Skill's Damage Over Time effectPlace into an item socket of the right colour to gain this skill. Right click to remove from a socket.: When an enemy affected by both Contagion and Essence Drain dies, the resulting Contagion proc will spread both effects. This is a unique interaction. Contagion will not spread other damage over time effects.
• Duration: Increases and reductions to duration function normally. The duration of Contagion and associated degeneration effects (Essence DrainEssence DrainSpell, Projectile, Duration, Chaos, AoE
  Level: (1-20)
  Cost: (8-23) Mana
  Cast Time: 0.70 sec
  Critical Strike Chance: 5.00%
  Effectiveness of Added Damage: 60%Requires Level 12Fires a projectile that applies a damage over time debuff when it hits. You are healed for a portion of the debuff damage. The debuff is spread by Contagion.Per 1% Quality:1Superior2Anomalous3Divergent1% increased Chaos DamageRegenerate 0.01% of Debuff Damage as Life5% increased Damage with HitsDeals (31.2-1503.2) Base Chaos Damage per second
  Regenerate 0.5% of Debuff Damage as Life
  Base duration is 3.8 seconds
  Deals (9-433) to (14-649) Chaos Damage
  Modifiers to Spell Damage apply to this Skill's Damage Over Time effectPlace into an item socket of the right colour to gain this skill. Right click to remove from a socket.) is not reset when spread to other enemies on death.

• Area of Effect: Modifiers to area of effect affect both the skill radius and spread radius of Contagion. Modifiers to area damage (such as Concentrated Effect SupportConcentrated Effect SupportSupport, AoE
  Icon: o
  Level: (1-20)
  Cost & Reservation Multiplier: 140%Requires Level 18Supports any skill with an area of effect, regardless of whether that skill deals damage.Per 1% Quality:1Superior2Anomalous3DivergentSupported Skills deal 0.5% increased Area DamageSupported Skills have 0.5% less Area of EffectSupported Skills have 0.5% reduced Enemy Stun ThresholdSupported Skills have 30% less Area of Effect
  Supported Skills deal (35-54)% more Area 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 apply.

• On hit effects: Contagion does not hit, and therefore cannot activate the effects of supports such as Hextouch SupportHextouch SupportTrigger, Support, Hex
  Icon: &
  Level: (1-20)
  Cost & Reservation Multiplier: 140%Requires Level 38Must support both a skill that hits enemies, and a hex curse skill to work. The hex will be applied when enemies are hit by the other skill. Cannot support totems, traps, or mines. Minions cannot apply hexes this way.Per 1% Quality:1Superior2Anomalous3Divergent0.5% increased Effect of Supported CursesSupported Skills deal 1% increased Damage with Hits and Ailments per Curse on Enemy0.5% reduced Effect of Supported Curses
  Supported Skills have 2% increased Curse DurationSupported Skills apply supported Curses on Hit
  Supported Skills have (50-12)% reduced Curse Duration
  You cannot Cast Supported Curse SpellsThis 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..

Gem level progression

Level					Cost and Reservation Multiplier	Critical Strike Chance	Mana Cost	Damage Effectiveness	Stored Uses	Cooldown	Vaal souls	Stored Uses	Soul Prevention Time	Attack Damage	Base duration	Attack Speed	Chaos Damage per sec	Exp.	Total Exp.
1	4	0	0	0	0%	0%	5	0%	0	0.00 sec	0	0	0 sec	0%	0.00 sec	0%	3.5	0	0
2	6	0	0	0	0%	0%	6	0%	0	0.00 sec	0	0	0 sec	0%	0.00 sec	0%	4.3	841	841
3	9	0	0	17	0%	0%	6	0%	0	0.00 sec	0	0	0 sec	0%	0.00 sec	0%	5.7	3099	3940
4	12	14	0	21	0%	0%	7	0%	0	0.00 sec	0	0	0 sec	0%	0.00 sec	0%	7.4	7433	11373
5	16	18	0	26	0%	0%	8	0%	0	0.00 sec	0	0	0 sec	0%	0.00 sec	0%	10.2	22895	34268
6	20	22	0	31	0%	0%	9	0%	0	0.00 sec	0	0	0 sec	0%	0.00 sec	0%	13.6	49725	83993
7	24	25	0	37	0%	0%	10	0%	0	0.00 sec	0	0	0 sec	0%	0.00 sec	0%	18	95714	179707
8	28	29	0	42	0%	0%	11	0%	0	0.00 sec	0	0	0 sec	0%	0.00 sec	0%	23.3	169595	349302
9	32	33	0	47	0%	0%	11	0%	0	0.00 sec	0	0	0 sec	0%	0.00 sec	0%	29.9	283759	633061
10	36	36	0	52	0%	0%	12	0%	0	0.00 sec	0	0	0 sec	0%	0.00 sec	0%	38.1	453996	1087057
11	40	40	0	58	0%	0%	13	0%	0	0.00 sec	0	0	0 sec	0%	0.00 sec	0%	48.1	703128	1790185
12	44	44	0	63	0%	0%	14	0%	0	0.00 sec	0	0	0 sec	0%	0.00 sec	0%	60.3	1061223	2851408
13	48	48	0	68	0%	0%	15	0%	0	0.00 sec	0	0	0 sec	0%	0.00 sec	0%	75.2	2065870	4917278
14	52	51	0	74	0%	0%	16	0%	0	0.00 sec	0	0	0 sec	0%	0.00 sec	0%	93.3	2507110	7424388
15	55	54	0	78	0%	0%	16	0%	0	0.00 sec	0	0	0 sec	0%	0.00 sec	0%	109.5	2573731	9998119
16	58	57	0	82	0%	0%	17	0%	0	0.00 sec	0	0	0 sec	0%	0.00 sec	0%	128.1	7611351	17609470
17	61	60	0	86	0%	0%	18	0%	0	0.00 sec	0	0	0 sec	0%	0.00 sec	0%	149.6	13437908	31047378
18	64	62	0	90	0%	0%	18	0%	0	0.00 sec	0	0	0 sec	0%	0.00 sec	0%	174.4	25052147	56099525
19	67	65	0	94	0%	0%	19	0%	0	0.00 sec	0	0	0 sec	0%	0.00 sec	0%	203	43869436	99968961
20	70	68	0	98	0%	0%	20	0%	0	0.00 sec	0	0	0 sec	0%	0.00 sec	0%	235.9	242081178	342050139
21	72	70	0	100	0%	0%	20	0%	0	0.00 sec	0	0	0 sec	0%	0.00 sec	0%	260.5	-342050139	0
22	74	0	0	0	0%	0%	21	0%	0	0.00 sec	0	0	0 sec	0%	0.00 sec	0%	287.5	0	0
23	76	0	0	0	0%	0%	21	0%	0	0.00 sec	0	0	0 sec	0%	0.00 sec	0%	317.2	0	0
24	78	0	0	0	0%	0%	21	0%	0	0.00 sec	0	0	0 sec	0%	0.00 sec	0%	349.7	0	0
25	80	0	0	0	0%	0%	22	0%	0	0.00 sec	0	0	0 sec	0%	0.00 sec	0%	385.4	0	0
26	82	0	0	0	0%	0%	22	0%	0	0.00 sec	0	0	0 sec	0%	0.00 sec	0%	424.5	0	0
27	84	0	0	0	0%	0%	23	0%	0	0.00 sec	0	0	0 sec	0%	0.00 sec	0%	467.3	0	0
28	86	0	0	0	0%	0%	23	0%	0	0.00 sec	0	0	0 sec	0%	0.00 sec	0%	514.3	0	0
29	88	0	0	0	0%	0%	24	0%	0	0.00 sec	0	0	0 sec	0%	0.00 sec	0%	565.7	0	0
30	90	0	0	0	0%	0%	24	0%	0	0.00 sec	0	0	0 sec	0%	0.00 sec	0%	621.9	0	0
31	91	0	0	0	0%	0%	24	0%	0	0.00 sec	0	0	0 sec	0%	0.00 sec	0%	652	0	0
32	92	0	0	0	0%	0%	25	0%	0	0.00 sec	0	0	0 sec	0%	0.00 sec	0%	683.5	0	0
33	93	0	0	0	0%	0%	25	0%	0	0.00 sec	0	0	0 sec	0%	0.00 sec	0%	716.5	0	0
34	94	0	0	0	0%	0%	25	0%	0	0.00 sec	0	0	0 sec	0%	0.00 sec	0%	750.9	0	0
35	95	0	0	0	0%	0%	25	0%	0	0.00 sec	0	0	0 sec	0%	0.00 sec	0%	787	0	0
36	96	0	0	0	0%	0%	25	0%	0	0.00 sec	0	0	0 sec	0%	0.00 sec	0%	824.7	0	0
37	97	0	0	0	0%	0%	26	0%	0	0.00 sec	0	0	0 sec	0%	0.00 sec	0%	864.1	0	0
38	98	0	0	0	0%	0%	26	0%	0	0.00 sec	0	0	0 sec	0%	0.00 sec	0%	905.4	0	0
39	99	0	0	0	0%	0%	26	0%	0	0.00 sec	0	0	0 sec	0%	0.00 sec	0%	948.5	0	0
40	100	0	0	0	0%	0%	26	0%	0	0.00 sec	0	0	0 sec	0%	0.00 sec	0%	993.6	0	0

Related helmet enchantments

The following helmet enchantments affect Contagion. No results found

Alternate skill effects

Contagion has the following alternate skill effects:

Item	Effect(s)
Celestial Contagion EffectCelestial Contagion EffectSkill Gem EffectYour Contagion becomes a Celestial Effect.	Your Contagion becomes a Celestial Effect.

Version history

Version	Changes
3.13.0	Now has a base radius of 17 (from 20).
3.12.0	Now has alternative quality.
3.8.0	No longer gains additional radius as the gem levels (previously gained +4 radius by gem level 20).
3.6.0	Mana Cost at gem level 1 is now 5 (was 11). Mana Cost at gem level 20 is now 20 (was 28). Can now affect up to 40 targets per cast (from 20).
2.6.0	Contagion's radius has increased from 18 to 20 units.
2.2.1d	Fixed an instance crash with Contagion.
2.1.1c	Fixed an instance crash with [...] Contagion.
2.1.1b	Fixed a bug where Contagion could be cast and spread through walls.
2.1.1	Contagion can now be supported by Iron Will.
2.1.0	Added to the game.