Szadek, Secret Keeper

+2: Target player put the top X cards of their library into their graveyard, where X is equal to Szadek's loyalty.
-4: Create a */* black horror creature token with "this creatures power and toughness are equal to the number of cards in opponents graveyards.
-13: You gain life X life and each opponent loses X life, where X is equal to the numbers of cards in opponents graveyards.