Elemental Blade Attunement

Heroic Tier
Prerequisite: Genasi, swordmage
Benefit: When you use a swordmage power that has the acid, cold, fire, lightning, or thunder keyword, you gain a +1 feat bonus to damage rolls.
This bonus increases to +2 at 11th level and to +3 at 21st level.

Published in Arcane Power, page(s) 125.