Rokalos, the World-Ripper

+1: Remove 2 loyalty counters from up to one target planeswalker. Create a colorless Skull artifact token.
-X: Target player loses X life and exiles half of X cards from their graveyard. You create X colorless Skull artifact tokens.
-10: You get an emblem with "At the beginning of your upkeep, you gain 1 life for each Skull you control and each opponent loses that much life."