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 a Food, a Clue and a Treasure artifact token.
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).
By utilizing Ghirapur Aether Grid to ping an opponent's creature with lethal or damage-based toughness reduction, you trigger Magmatic Galleon's ability to generate excess noncombat damage whenever that creature is dealt more damage than its remaining toughness. Because Academy Manufactor is present to replace any single token creation event with a Trio of a Clue, a Food, and a Treasure, that single ping spirals into a massive cascade of artifacts. You can then take those newly minted tokens and feed them right back into Ghirapur Aether Grid to keep the loop going, ultimately turning your infinite artifacts into an overwhelming victory through endless damage or resources.