Yoshimaru, Slain

Vigilance, Trample, Lifelink
Whenever a Planeswalker you control enters the battlefield, put 2 +1/+1 counters on Yoshimaru, Slain.
Whenever a Planeswalker you control leaves the battlefield, exile Yoshimaru, Slain.

"Dumb mutt, just another cog in the
murder machine."
-Nezumi