Mirka, Combine Guardian

Evolve (Whenever a creature enters the battlefield under your control, if that creature has greater power or toughness than this creature, put a +1/+1 counter on this creature.)

Whenever one or more +1/+1 counters are put on Mirka, create a 0/3 blue Crab creature token or a 1/1 blue Fish creature token.

Whenever one or more creature token you control deals combat damage to a player, you may draw a card.