In a bad spot, you draw on arcane energy to help you stay on your feet.

Daily   ✦     Arcane, Healing
Immediate Interrupt      Personal

Trigger: You drop to 0 hit points or fewer.

Effect: You regain hit points equal to your level + your Intelligence modifier.

Update (1/25/2012)
Updated in Class Compendium.

Published in Player's Handbook, page(s) 169, Class Compendium.