Wartortle

Evolution — Whenever Wartortle blocks a creature, at the beginning of your next upkeep, Evolve. (Sacrifice this creature, then search the evolution deck for a it's evolved form and put it onto the battlefield under your control.)

Bubble — {u}: Target creature gets -1/-0 until
the end of turn.

Bite — {1}{u}, {t}: Put a stun counter on target creature.