River Boa

+1: Until your next turn, whenever a creature deals combat damage to Vraska, destroy that creature. −3: Destroy target nonland permanent. −7: Create three 1/1 black Assassin creature tokens with "Whenever this token deals combat damage to a player, that player loses the game."

When this creature enters, look at the top two cards of your library. Put one of them into your hand and the other on the bottom of your library.

Trample Morbid — This creature enters with two +1/+1 counters on it if a creature died this turn.

First strike When this creature enters, destroy target nonartifact, nonblack creature. That creature can't be regenerated.

(T: Add B.)

(T: Add G.)

When this creature enters, target opponent loses 2 life and you gain 2 life.

1, T: Put a +1/+1 counter on this creature.