How can you create a combo with Voltaic Key, Rings of Brighthearth, Chromatic Orrery?
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[START OF COMBO]This combo can be formed with Voltaic Key, Rings of Brighthearth, Chromatic Orrery

Color identity: C
Mana cost: 
Steps:
  1. Activate Chromatic Orrery's first activated ability, adding {C}{C}{C}{C}{C} to your mana pool.
  2. Activate Voltaic Key by paying {1} and tapping it, targeting Chromatic Orrery.
  3. Rings of Brighthearth triggers, allowing you to pay {2} to copy Voltaic Key's ability.
  4. Resolve the copied ability, untapping Voltaic Key.
  5. Resolve the ability from step 2, untapping Chromatic Orrery.
  6. Repeat any number of times.
  7. Once you have infinite mana, you may repeat the loop targeting any artifact in step 2, and/or activating Chromatic Orrery's last ability in step 1.[END OF COMBO STEPS]

Result:
  - Infinite card draw
  - Infinite colored mana
  - Infinite colorless mana
  - Infinite untap of artifacts you control[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
[END OF COMBO PREREQUISITES]
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