Zoo Escapees (Teenage Mutant Ninja Turtles #138)

Creature — Boar Rhino - {1}{G}
When this creature leaves the battlefield, create a Mutagen token. (It's an artifact with "{1}, {T}, Sacrifice this token: Put a +1/+1 counter on target creature. Activate only as a sorcery.")
2/2
„They imagine that out beyond the zoo, beyond the pen, there exists another world, and it encroaches with rapid certainty upon their own . . .“