Urza, Karn's Creator

Karn Planeswalkers are not subject to the Planeswalker uniqueness rule.
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+3: Search your library for a Karn Planeswalker.
Shuffle, then put it on top of your library.
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+1: Search your library for a Karn Planeswalker
and put it into your hand. Shuffle.
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-5: Search your library for a Karn Planeswalker
and put it onto the battlefield. Shuffle.