First printed in Fifth Dawn (2004)
All 3 prints
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The List (PLST) #10E-321, 2021
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Tenth Edition (10E) #321, 2007
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Fifth Dawn (5DN) #116, 2004
Doubling Cube 
Artifact
, 
: Double the amount of each type of unspent mana you have.
Legality
- Legal in
- Modern, Legacy, Vintage, Penny Dreadful, Commander, Duel Commander, PreDH, Tiny Leaders, Oathbreaker
- Not legal in
- Standard, Pioneer, Pauper, Future Standard, Historic, Timeless, Alchemy, Premodern, Old School 93/94, Gladiator, Pauper Commander, Brawl, Standard Brawl, Competitive Brawl
MTGO price: 0.006 TIX, the cheapest non-foil print (average sell price on GoatBots, 28 Oct 2026).
Combos
15 combos from Commander Spellbook, the most popular first.
- Infinite mana permanents you control can produce, Infinite untap of artifacts you control: Doubling Cube + Rings of Brighthearth + Voltaic Key
- Infinite artifact ETB, Infinite artifact LTB…: Capsize + Doubling Cube
- Infinite untap of artifacts you control, Infinite colored mana…: Doubling Cube + Filigree Sages
- Infinite copies of artifacts you control, Infinite creature tokens…: Doubling Cube + Swiftfoot Boots + Urza, Prince of Kroog
- Infinitely large creature until end of turn, Infinite mana permanents you control can produce…: Doubling Cube + Karn, the Great Creator + Umbral Mantle
- Infinite copies of artifacts you control, Infinite creature tokens…: Doubling Cube + Lightning Greaves + Urza, Prince of Kroog
- Infinitely large creature until end of turn, Infinite mana permanents you control can produce…: Doubling Cube + Karn, Silver Golem + Umbral Mantle
- Infinite copies of artifacts you control, Infinite creature ETB…: Akroma's Memorial + Doubling Cube + Urza, Prince of Kroog
- Infinite copies of artifacts you control, Infinite creature ETB…: Doubling Cube + Thousand-Year Elixir + Urza, Prince of Kroog
- Infinite mana permanents you control can produce, Infinite untap of creatures you control: Doubling Cube + Karn, the Great Creator + Sword of the Paruns
