Your blade turns into acid mid-swing, splattering against your foe and splashing a flesh-searnig spray on nearby enemies.

Encounter   ✦     Acid, Arcane, Weapon
Standard Action      Melee weapon

Target: One creature

Attack: Intelligence vs. AC

Hit: 2[W] + Intelligence modifier acid damage, and enemies adjacent to the target take 1d6 + Strength modifier acid damage.

Aegis of Assault: When you use your aegis of assault immediate reaction, you can use this power in place of melee basic attack.

Published in Forgotten Realms Player's Guide, page(s) 31.