Duty of the Honourable

Each creature you control has Endurance 1. (At
the beginning of each end step, if this creature took
damage this turn, put a +1/+1 counter on it. Each
instance of Endurance triggers separately.)
{w}{b}{g}, Pay 3 life: Duty of the Honourable deals
1 damage to each creature you control, and you
gain that much life.
If it came to it, every man, woman, and child in
Endurica would die for the tribe.