Sorcerous Assassin

Heroic Tier
Prerequisite: Drow, sorcerer
Benefit: When you have combat advantage against a target, you gain a +2 feat bonus to damage rolls against that target when you use sorcerer powers that have the poison or psychic keyword. This bonus increases to +4 at 11th level and to +6 at 21st level. You also gain a +1 feat bonus to Stealth checks.

Published in Arcane Power, page(s) 129.