Gargon, Ichor Injestor

Once during each of your turns, you may cast a skeleton creature card from your graveyard.
Sacrifice twenty skeletons: target player searches
their library and graveyard for five cards and
exile the rest. Put the chosen cards on top of
their library in any order. They lose half of their
life, rounded up.
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Foolish mortals cannot recognize the worth of their sacrifice.