Cerlur, Treasure Plunderer

Deathtouch
Whenever Cerlur, Treasure Plunderer deals
combat damage to a player that player puts that
many cards from the top of their library into their graveyard.
Cerlur, Treasure Plunderer power is equal
to the number of card types in all graveyards.
(Melds with Larvix, Exploiter of Secrets)