Plapu, Bestial Wanderer

Plapu enters the battlefield with two +1/+1 counters on it for each time you've cast your commander from the command zone this game.

Whenever a creature enters the battlefield under your control, choose one:
•Put a +1/+1 counter on Plapu.
•Remove two +1/+1 counters from Plapu. Plapu fights target creature an opponent controls.

When Plapu destroys a creature, transform Plapu.