Rocksteady, Mutant Marauder (Teenage Mutant Ninja Turtles Eternal)

Legendary Creature Ñ Rhino Mutant - Partner with Bebop, Skull & Crossbones (When this creature enters, target player may put Bebop into their hand from their library, then shuffle.)
Trample
Whenever another nontoken creature you control enters, put a +1/+1 counter on target creature.