- All permanents on the battlefield.
- An opponent controls an indestructible creature, or you have a way to give an opponent's creature indestructible.
- You control a number of artifacts greater than two times the indestructible creature's toughness.
- Give an opponent's creature indestructible, if needed.
- Activate Ghirapur Aether Grid by tapping two artifacts you control, dealing 1 damage to an indestructible creature an opponent controls.
- If the creature has less than 0 toughness, Magmatic Galleon's second ability triggers, creating three Treasure artifact tokens.
- Repeat from step 2.
- Once you have infinite tokens, you may sacrifice them to their abilities, or tap them via Ghirapur's Aether Grid to deal infinite damage to any target(s).
- Infinite damage.
- Infinite Treasure tokens.
- Infinite colored mana.