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 two Treasure artifact tokens.
Repeat from step 2.
This clever loop turns Magmatic Galleon into an endless engine of wealth by weaponizing its replacement-level damage tracking. While Ghirapur Aether Grid provides the repeatable ping to trigger the Galleon, Adrix and Nev, Twincasters step in to double every resulting payoff, turning a single excess-damage trigger into a surplus of Treasure tokens. By cycling those very same tokens back to fuel the Aether Grid's activation cost, you sustain an endless loop that floods the board with infinite tapped artifacts.