Death's Resurgence is a 19th level swordmage Daily power that was introduced in the 372nd edition of Dragon (magazine).
Death's Resurgence
Swordmage Attack 19
Death's power turns your foe's triumph into a victory of your own. Your pain explodes from you, and as others fall, you draw strength from their defeat.
Close burst 2
Trigger: You become bloodied or drop to 0 or fewer hit points
Target: Each enemy in burst
Attack: Intelligence vs. Reflex
Hit: 3d8+ Intelligence modifier necrotic damage.
Miss: Half damage.
Effect: You can spend a healing surge. If you do, you regain 1d6 additional hit points for each enemy bloodied or reduced to 0 hit points by this attack.