Breeches, the Blastmaker {1}{U}{R}
Legendary Creature — Goblin Pirate
Menace
Whenever you cast your second spell each turn, you may sacrifice an artifact. If you do, flip a coin. When you win the flip, copy that spell. You may choose new targets for the copy. When you lose the flip, Breeches deals damage equal to that spell's mana value to any target.
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Cards that do something similar expected a card that isn't here?
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Mica, Reader of Ruins 80%
$0.25#15402
"Whenever you cast an instant or sorcery spell, you may sacrifice an artifact. If you do, copy that spell and you may choose new targets for the copy."