Ambush.

Assassin active mastery skill, unlocked at level 3.

Global · 19 Sept 2026

What it does

Deals 126 damage to a target within 4m. Increases damage by 30% on landing as a Back attack. 7 Stagger Gauge Damage

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

Specialisations

3 slots

From level	Effect
8	Engraves 2 Insignias for 10s on landing as a Back attack
8	Absorbs 3% HP
8	Breaks Protective Shields on hit
12	50% chance to trigger [Whirlwind Slice] on hit
16	+2 consecutive uses

Point cost

21 points in total

Skill level	Points	Character level
1	0	3
2	1	3
3	1	6
4	1	9
5	2	12
6	2	15
7	2	18
8	4	21
9	4	24
10	4	27

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 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 Infiltrate Active · level 10

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.