[Cast metalwork colossus for free, ammit eternal gets -1/-1 crew a cultivator's caravan with this colossus, then emerge an EDF using the new colossus, which makes a zombie for your opponent and puts a -1/-1 counter on ammit eternal. kalitas trigger will resolve first, then you can tap down 4 zombies. There's currently Kalitas, Ammit Eternal as a 3/3 and 2 zombies on the battlefield.

float blue with an uncrewed cultivator's caravan and cast fleetwheel cruiser with mana from the hedron archive. Ammit eternal is now a 2/2. While the fleetwheel cruiser trigger is on the stack, use the metalwork colossus in your graveyard to sacrifice an uncrewed cultivator's caravan and the fleetwheel to bring it back to your hand.

Cast your 2nd colossus for free. Ammit eternal is now a 1/1, and then emerge EDF again with the colossus. Kalitas trigger will resolve first, then you tap down Kalitas and the remaining 3 zombies. Ammit eternal will die from the EDF being cast.

Swing for 15 using Metalwork Colossus and a cultivator's caravan. ](/spoiler)