Assassin's Mark

Assassin's Mark, while not terribly strong on its own, gets incredibly effective in the hands of the right player. A character heavily invested in increased Critical Chance and Critical Damage will absolutely decimate their foes when they afflict them with this weakness. While it's not the most direct of curses, Assassin's Mark stands among the best when utilized correctly.

Description on the official Path of Exile website

Assassin's Mark is a spell that curses all targets in an area, making them more vulnerable to critical strikes. When killed, affected enemies grant life and mana, as well as a chance to gain a power charge.

Skill functions and interactions

• Increased Critical Chance: The modifier Cursed enemies have an additional x% chance to receive a Critical Strike listed on the gem is additive with player's current chance to get a critical strike. If a player has a 20% chance to critically strike with an attack or spell, and it hits a target inflicted with level 1 Assassin's Mark, a player will have an an additional 5% chance of the strike being a critical one, for a total of a 25% chance.

• Cursed enemies take x% increased extra damage from Critical Strikes: As this modifies the damage the enemy takes, this modifier is effectively a multiplier to the player's critical damage. As an increased modifier, it stacks additively with like modifiers such as the of Toughness map suffix.

• Assassin's Mark can be turned into an aura by linking it with the .

  

  The aura version of Assassin's Mark

Gem level progression

Level				Mana Cost	Duration	Radius	Crit Chance	Life per Kill	Mana per Kill	Power Charge Chance	Exp.	Total Exp.
1	16	18	26	16	N/A	N/A	N/A	65	25	N/A	0	0
2	20	22	31	17	N/A	N/A	N/A	99	28	N/A	49725	49725
3	24	25	37	18	N/A	N/A	N/A	134	32	N/A	95714	145439
4	28	29	42	19	N/A	N/A	N/A	169	35	N/A	169595	315034
5	31	32	46	21	N/A	N/A	N/A	204	39	N/A	199345	514379
6	34	35	50	22	N/A	N/A	N/A	239	42	N/A	285815	800194
7	37	37	54	23	N/A	N/A	N/A	274	46	N/A	401344	1201538
8	40	40	58	24	N/A	N/A	N/A	309	50	N/A	554379	1755917
9	43	43	62	25	N/A	N/A	N/A	344	53	N/A	755049	2510966
10	46	46	66	26	N/A	N/A	N/A	367	56	N/A	1016533	3527499
11	49	48	70	26	N/A	N/A	N/A	390	58	N/A	1898602	5426101
12	52	51	74	27	N/A	N/A	N/A	413	60	N/A	1964019	7390120
13	55	54	78	28	N/A	N/A	N/A	437	63	N/A	2573731	9963851
14	58	57	82	29	N/A	N/A	N/A	460	65	N/A	4676439	14640290
15	60	59	84	29	N/A	N/A	N/A	483	68	N/A	3017327	17657617
16	62	60	87	30	N/A	N/A	N/A	506	70	N/A	7823001	25480618
17	64	62	90	31	N/A	N/A	N/A	530	72	N/A	15264208	40744826
18	66	64	92	31	N/A	N/A	N/A	553	75	N/A	26272845	67017671
19	68	66	95	32	N/A	N/A	N/A	576	77	N/A	62872274	129889945
20	70	68	98	33	N/A	N/A	N/A	600	80	N/A	212023122	341913067
21	72	70	100	34	N/A	N/A	N/A	623	82	N/A	N/A	N/A
22	74	N/A	N/A	34	N/A	N/A	N/A	646	84	N/A	N/A	N/A
23	76	N/A	N/A	35	N/A	N/A	N/A	669	87	N/A	N/A	N/A
24	78	N/A	N/A	36	N/A	N/A	N/A	693	89	N/A	N/A	N/A
25	80	N/A	N/A	36	N/A	N/A	N/A	716	91	N/A	N/A	N/A
26	82	N/A	N/A	37	N/A	N/A	N/A	739	94	N/A	N/A	N/A
27	84	N/A	N/A	38	N/A	N/A	N/A	762	96	N/A	N/A	N/A
28	86	N/A	N/A	39	N/A	N/A	N/A	786	99	N/A	N/A	N/A
29	88	N/A	N/A	39	N/A	N/A	N/A	809	101	N/A	N/A	N/A
30	90	N/A	N/A	40	N/A	N/A	N/A	832	103	N/A	N/A	N/A
31	91	N/A	N/A	40	N/A	N/A	N/A	844	105	N/A	N/A	N/A
32	92	N/A	N/A	41	N/A	N/A	N/A	855	106	N/A	N/A	N/A
33	93	N/A	N/A	41	N/A	N/A	N/A	867	107	N/A	N/A	N/A
34	94	N/A	N/A	42	N/A	N/A	N/A	879	108	N/A	N/A	N/A
35	95	N/A	N/A	42	N/A	N/A	N/A	890	109	N/A	N/A	N/A
36	96	N/A	N/A	42	N/A	N/A	N/A	902	111	N/A	N/A	N/A
37	97	N/A	N/A	43	N/A	N/A	N/A	914	112	N/A	N/A	N/A
38	98	N/A	N/A	43	N/A	N/A	N/A	925	113	N/A	N/A	N/A
39	99	N/A	N/A	43	N/A	N/A	N/A	937	114	N/A	N/A	N/A
40	100	N/A	N/A	44	N/A	N/A	N/A	948	115	N/A	N/A	N/A

Related helmet enchantments

The following helmet enchantments affect Assassin's Mark.

Note that helmet enchantments are no longer obtainable since version 3.23.0 and can only be obtained in permanent leagues as already enchanted items from before this patch.

Name		Labyrinth	Stats	Spawn Weighting
Enchantment Assassins Mark Curse Effect 1	66	Merciless Labyrinth	20% increased Assassin's Mark Curse Effect	helmet 100
Enchantment Assassins Mark Curse Effect 2	75	Eternal Labyrinth	30% increased Assassin's Mark Curse Effect	helmet 100
Enchantment Assassins Mark Duration 1	66	Merciless Labyrinth	30% increased Assassin's Mark Duration	helmet 0
Enchantment Assassins Mark Duration 2	75	Eternal Labyrinth	45% increased Assassin's Mark Duration	helmet 0

Version history

Version	Changes
2.0.0	Mana cost reduced at all levels. Area of effect increases per gem level reduced, but the base area of effect has been increased by 37.5% (from 16 to 22). Normalised the increased duration per gem level.
1.2.0	Renamed to Assassin's Mark, previously Critical Weakness. The 'More critical damage' has been heavily reduced Now grant's a chance to gain a power charge on kill
1.0.0	The bonus to Critical Multiplier has been reduced by a flat 20% at all levels.
0.10.7	Fixed a bug where the additional critical damage applied by Critical Weakness didn't work correctly.
0.9.2c	Fixed a bug where Critical Weakness would prevent critical strikes from doing damage.
0.9.2	Critical Weakness has been added to the game.