Monstrous War-Leech — Dominaria United #98

Kicker (You may pay an additional as you cast this spell.)

As this creature enters, if it was kicked, mill four cards. (To mill a card, put the top card of your library into your graveyard.)

Monstrous War-Leech's power and toughness are each equal to the greatest mana value among cards in your graveyard.