Lutrus, Doomed Experiment

+1: Put a 1/1 black Horror creature token onto the battlefield with, "When this creature deals combat damage to a player, they discard a card."
0: Put a land token onto the battlefield called Catacombs with, "Whenever you attack with one or more creatures, target creature can't be blocked."
-7: Each opponent gets an emblem with, "At the beginning of your upkeep, sacrifice a creature or this emblem deals 7 damage to you."