Aleko, Diviner Warden
At the beginning of each end step, exile target noncreature,
nonland card from the graveyard of the player whose turn it is with
a shimmer counter on it.
Once per turn, you may cast a card from exile if it has a shimmer
counter on it and you may spend mana as though it were mana of any
type to cast that spell. If you cast a spell this way, remove a
shimmer counter from that card.
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