Gloomstalk Harvester

{1}{b}, {t}, Put a -1/-1 counter on target Scarecrow you control: You lose 1 life and you draw a card.
{3}{b}, {ut}, Remove a -1/-1 counter from Gloomstalk Harvester: Each opponent sacrifices a creature.
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Where the grass becomes grey and the crows stop cawing is where you will meet your end.