Santy, Patient Plotter

At the beginning of each opponent's end step,
that player faces a villainous choice —
•Hearts — You draw a card, or put a plot
counter on this creature.
•Spades — They lose 1 life, then remove a plot
counter from this creature.
{t}, Remove X plot counters: Exile a spell from a
graveyard with mana value X. You may cast the
exiled spell without paying it's mana cost.