Nergigante,Terrible Dragon

Flying, Trample
Whenever a creature an opponent controls is destroyed as a result of combat damage from creature with power 4 or
more, put a +1/+1 counter on Nergigante.

Whenever Nergigante gains a +1/+1 counter, Nergigante deals 4 damage to any target.

At the beginning of your upkeep, if Nergigante has five or more +1/+1 counters on it, destroy all creatures with toughness less than Nergigante's power then remove all counters.