Maut

{3}{b}: Maut applies Ancient Curse to all creatures. If the creature ends a turn untapped, remove Ancient
Curse from that creature. If a creature has
Ancient Curse for more than 2 turns, destroy it.
{6}{b}{b}: Maut uses Black Wings, dealing 5 damage to 2 creatures, and 2 damage to every other creature
that opponent controls.
{4}{b}: Maut uses Stygian Annihlation. At the beginning of your next upkeep, destroy all
untapped creatures. Use this only once
every 2 turns.