Banzai, Biting Brute

Laugh 3 (Whenever this creature deals combat damage to a player, that player mills three cards. Until end of turn, you may play a card from cards milled this way and you may spend mana of any color to cast it.)

Once during your turn, whenever you cast a spell you
don't own, untap Banzai and up to two other hyenas you control. There is an additional combat phase after this phase.

"Ha ha! Oh man! It just never gets old, does it?" —Banzai, on hunting meerkats.