Gimli, Mournful Avenger has
indestructible (Effects that say "destroy" don't destroy that permanent. An indestructible creature can't be destroyed by damage.) as long as two or more creatures died under your control this turn.
Whenever another creature you control dies, put a +1/+1 counter on Gimli. When this ability resolves for the third time this turn, Gimli
fights (Each deals damage equal to its power to the other.) up to one target creature you don't control.