Assault Stance.

Assassin passive mastery skill, unlocked at level 13.

Global · 19 Sept 2026

What it does

Increases caster's Critical Damage Boost by 6%.

Text from the KR/TW client; Global numbers may differ.

Stat effects

Level 2 and 40

Stat	Level 2	Level 40
Critical Damage Boost	17.5%	112.5%

Point cost

21 points in total

Skill level	Points	Character level
1	0	13
2	1	13
3	1	16
4	1	19
5	2	22
6	2	25
7	2	28
8	4	31
9	4	34
10	4	37

More Assassin skills

All

Quick Slice Active · level 1 Savage Roar Active · level 1 Shadowstrike Active · level 1 Heightened Sixth Sense Passive · level 1 Dodge Active · level 1 Ambush Active · level 3 Heart Gore Active · level 4 Storm Rampage Active · level 5 Exploit Weakness Passive · level 6 Whirlwind Slice Active · level 7 Flash Slice Active · level 8 Apply Poison Passive · level 9

Data from the Global client build of 19 Sept 2026 ; skill descriptions come from the KR/TW client, so a number inside one can differ on the Global servers — the tables above are Global values . Snapshot taken 30 Sept 2026. AtreiaLegend is an unofficial fan site, not affiliated with or endorsed by NCSOFT. AION and all related content are trademarks of NCSOFT Corporation.