It Which Doesn't Feel

Flash, Trample
You don't lose the game for having 0 or less life. If you would take damage or lose life, put that many +1/+1 counters on It Which Doesn't Feel instead.
If It Which Doesn't Feel has 10 or more +1/+1 counters on it, sacrifice it. You gain life equal to its toughness.
Elementals live forever, but with what regrets?