Voltaic Key + Forsaken Monument + Rings of Brighthearth + Thran Dynamo

Prerequisites

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Steps

1. 1Activate Thran Dynamo by tapping it, adding .
2. 2Forsaken Monument triggers, adding .
3. 3Activate Voltaic Key by paying and tapping it, targeting itself.
4. 4Rings of Brighthearth triggers, causing you to pay to copy Voltaic Key's ability, targeting Thran Dynamo.
5. 5Resolve both Voltaic Key abilities, untapping it and Thran Dynamo.
6. 6Repeat.

Effects

• Infinite colorless mana
• Infinite mana artifacts you control can produce
• Infinite untap of artifacts you control