Flying
Heroic — Whenever you cast a spell that targets War-Wing Siren, put a +1/+1 counter on War-Wing Siren.
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Fracture
Strixhaven: School of Mages
Destroy target artifact, enchantment, or planeswalker.
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Unexpected Windfall
Adventures in the Forgotten Realms
As an additional cost to cast this spell, discard a card. Draw two cards and create two Treasure tokens. (They're artifacts with "{T}, Sacrifice th...
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Necropotence - Borderless - Showcase
Wilds of Eldraine: Enchanting Tales
Skip your draw step. Whenever you discard a card, exile that card from your graveyard. Pay 1 life: Exile the top card of your library face down. Pu...
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Void Mirror
Modern Horizons 2
Whenever a player casts a spell, if no colored mana was spent to cast it, counter that spell.
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Rag Man
Fourth Edition
{B}{B}{B}, {T}: Target opponent reveals their hand and discards a creature card at random. Activate this ability only during your turn.