Voltaic Key + Forsaken Monument + Rings of Brighthearth + Mana Vault
Produces: Infinite untap of artifacts you control, Infinite colorless mana, Infinite mana artifacts you control can produce
- Color identity
- C
Steps
- Activate Mana Vault by tapping it, adding {C}{C}{C}.
- Forsaken Monument triggers, adding {C}.
- Activate Voltaic Key by paying {1} and tapping it, targeting itself.
- Rings of Brighthearth triggers, causing you to pay {2} to copy Voltaic Key's ability, targeting Mana Vault.
- Resolve both Voltaic Key abilities, untapping it and Mana Vault.
- Repeat.
How to execute this combo
The "Voltaic Key + Forsaken Monument + Rings of Brighthearth + Mana Vault" combo takes 6 steps in order. Make sure you have the mana open and permanents listed in the prerequisites before you start — opponents can respond between steps.
The end result: Infinite untap of artifacts you control, Infinite colorless mana, Infinite mana artifacts you control can produce.
Practice the line offline: lay out the cards, walk through each step, and note where you can lose the combo (summoning sickness, lack of priority, removal on a key permanent). In game, announce each step clearly; in casual play you can offer to shortcut after demonstrating the loop.
The best window is a turn when opponents are tapped out or after they commit a spell — hold protection (a counter, Vexing Shusher) if the combo wins on the spot.