Flash Slice.

Assassin active mastery skill, unlocked at level 8.

Global · 19 Sept 2026

What it does

Moves to the opposite side of a target within 4m and deals 181 damage to up to 4 enemies with a 3000% chance to inflict Blind for 3000. 100% chance to inflict Blind on NPC targets. 7 Stagger Gauge Damage

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

Specialisations

3 slots

From level	Effect
8	+2s Blind duration
8	+6m Range
8	Up to +20% damage when more targets hit
12	+1 consecutive use
16	50% chance to rotate and inflict Stun for 3s on hitting a target afflicted with Blind

Point cost

21 points in total

Skill level	Points	Character level
1	0	8
2	1	8
3	1	11
4	1	14
5	2	17
6	2	20
7	2	23
8	4	26
9	4	29
10	4	32

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 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.