マナの大砲 (Mana Cannons) (ja)
Enchantment (CMC 3)
Whenever you cast a multicolored spell, Mana Cannons deals X damage to any target, where X is the number of colors that spell is.
Decks with Mana Cannons
[DMC] Dominaria United Commander #7 (R)
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[DMC] Dominaria United Commander #83 (R)