Kethek, Crucible Goliath [PONE]

Kethek, Crucible Goliath

Legendary Creature — Phyrexian Beast

At the beginning of your end step, you may sacrifice another creature. If you do, reveal cards from the top of your library until you reveal a nonlegendary creature card with lesser mana value, put it onto the battlefield, then put the rest on the bottom of your library in a random order.

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