Your blade tints red as it draws your enemy's blood to strengthen you.

Encounter   ✦     Arcane, Healing, Weapon
Standard Action      Melee weapon

Target: One creature

Attack: Strength vs. AC, Dexterity vs. AC, or Constitution vs. AC

Hit: 2[W] + Strength, Dexterity, or Constitution modifier damage + 2d6 necrotic damage. You regain hit points equal to twice the necrotic damage you dealt.

Published in Forgotten Realms Player's Guide, page(s) 45.