Dreamshaper Shaman
At the beginning of your end step, you may pay 
and sacrifice a nonland permanent. If you do, reveal cards from the top of your library until you reveal a nonland permanent card. Put that card onto the battlefield and the rest on the bottom of your library in a random order.
Magic is the true artist's medium.
Illustrated by Steve Prescott
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If there are no nonland cards remaining in your library, you just randomize your library and continue playing.
You can't pay
and not sacrifice a nonland permanent, or vice versa. The cost must be paid in full or not at all.While resolving Dreamshaper Shaman's ability, you can't pay
more than once or sacrifice multiple permanents.Dreamshaper Shaman can be sacrificed to pay for the cost of its own triggered ability.
