This clever loop relies on Technomancer's ability to pull low-cost artifact creatures straight out of the graveyard, which we recreate by casting Machine God's Effigy to enter as a copy of the Technomancer. By tapping the Effigy-copy for blue mana in response to its own enter-the-battlefield trigger and then sacrificing it to Lithatog, we send the Effigy back to the graveyard just in time for its resolution to recur it. This creates a perpetual cycle of entering and leaving the battlefield that generates infinite mana, endless sacrifice triggers, and an infinitely large Lithatog.