Prince Valoth's Pact

During your upkeep put a pact counter on this enchantment, then lose 1 life for every pact
counter. During your main phase add {b}{b} for
each pact counter on this card. At your end step,
if there are six on more pact counters on this enchantment you lose the game.
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"You said you wanted to unlimited power at any cost.
I gave you exactly what you asked for; Now pay the
cost!" - Shadow Prince Valoth