The Fifth, Gilgamesh

Flying, Deathtouch, First Strike, Trample
Protection from Cats

When Gilgamesh enters the battlefield and during
the beginning of your upkeep, it fights up to one
target creature you don't control. If the creature was
a Legendary Cat Warrior, exile it and transform Gilgamesh instead.

Whenever a creature dealt damage by Gilgamesh this
turn dies, put a +1/+1 counter on it.