Totem

The Totem Aspect is one of the most powerful aspects you can create. When triggered, it first checks your inventory for any Totems of Undying. Should it find one, it will consume it, restore 15 HP and go on cooldown for 10 seconds. If you don't have any totems, only 5 HP will be restored and the aspect will have a 2.5 minute cooldown.

In both of these cases, should the damage have been lethal, the health restored by the Totem Aspect will save you.