Shadowstrike.

Assassin active mastery skill, unlocked at level 1.

Global · 19 Sept 2026

What it does

Moves behind a target within 20m and deals 43 damage and rotates and inflicts Stun for 3000. 10 Stagger Gauge Damage

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

Specialisations

3 slots

From level	Effect
8	+1s Stun duration
8	+20% caster Critical Damage Boost for 5s on hit
8	50% chance to inflict Seal for 5s on hit
12	50% chance to inflict Root for 5s on hit
16	Changes to AoE Skill

Point cost

21 points in total

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

More Assassin skills

All

Quick Slice Active · level 1 Savage Roar 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 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.