Arthur, Marigold Knight {2}{U}{R}{W}
Legendary Creature — Mouse Knight
Haste
Whenever Arthur and at least one other creature attack, look at the top six cards of your library. You may put a creature card from among them onto the battlefield tapped and attacking. Put the rest on the bottom of your library in a random order. Return that creature to its owner's hand at end of combat.
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Cards that do something similar expected a card that isn't here?
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