![Whir of Invention [Aether Revolt Prerelease Promos] Duel Decks Anthology When that mana is spent](https://cdn.shopify.com/s/files/1/0578/2503/4408/files/3016f992-f90d-5308-803f-665996d67b93.jpg?v=1738951169)
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When that mana is spent to cast an instant or sorcery spell
Karma deals damage to that player equal to the number of Swamps they control
Exile Gonti's Aether Heart: Take an extra turn after this one
to tilt the massive jug for a sip
Set: Tempest Type: Artifact Rarity: Rare Cost: {2} Sacrifice a creature: Target player mills cards equal to the sacrificed creature's power
Whir of Invention [Aether Revolt Prerelease Promos] Duel Decks Anthology When that mana is spentSet: Aether Revolt Prerelease Promos Type: Instant Rarity: Rare Cost: {X}{U}{U}{U} Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for {1}.) Search your library for an artifact card with mana value X or less, put it onto the battlefield, then shuffle.
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