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Voltaic Key + Rings of Brighthearth + Astral Cornucopia

Colorless
Voltaic Key
Voltaic Key
Rings of Brighthearth
Rings of Brighthearth
Astral Cornucopia
Astral Cornucopia
Infinite untap of artifacts you controlInfinite colored manaInfinite mana artifacts you control can produce

How it works

  1. Activate Astral Cornucopia by tapping it, adding at least four mana of any color.
  2. Activate Voltaic Key by paying 1 and tapping it, targeting itself.
  3. Rings of Brighthearth triggers, causing you to pay 2 to copy Voltaic Key's ability, targeting Astral Cornucopia.
  4. Resolve both Voltaic Key abilities, untapping it and Astral Cornucopia.
  5. Repeat.
Legal in:CommanderLegacyModernOathbreakerVintage
712 decks$11.09