Edge of Autumn
Sorcery
Oracle Text
If you control four or fewer lands, search your library for a basic land card, put it onto the battlefield tapped, then shuffle. Cycling—Sacrifice a land. (Sacrifice a land, Discard this card: Draw a card.)Rules for this card
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A keyword ability that lets a card be discarded and replaced with a new card. See rule 702.29, “Cycling.”
Rulings (1)
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Wizards of the CoastEdge of Autumn checks how many lands you control as it resolves. If you control five or more lands, it simply does nothing as it resolves.