Exile Moonvessel with Soul Foundry;
Make a Moonvessel token;
Sac the token to Spawning Pit;
Untap Soul Foundry with Dross Scorpion;
Use the floated mana from Moonvessel to Activate Soul Foundry;
Repeat;

For mana:
Tap Sol Ring to make 2 2/2's with Spawning Pit;
Tap the 2 2/2's with Clock of Omens to untap Sol Ring;

For infinite damage:
Use Gilded Lotus to generate 3 mana (3m);
Make a Perilous Myr with 2 mana and the Soul Foundry (1m);
Use 2 random artifects with Clock of Omens to untap Gilded Lotus;
Sac the Perilous Myr to gain a charge counter on Spawning Pit and untap Soul Foundry;
Use Gilded Lotus to generate 3 mana (4m);
Make a Perilous Myr with 2 mana and the Soul Foundry (2m);
Sac the Perilous Myr to gain a charge counter on Spawning Pit and untap Soul Foundry;
Use 1 mana to make another token with Spawning Pit (1m);
Sac the token to generate another charge counter and untap Gilded Lotus;
Use Gilded Lotus to generate 3 mana (4m);
Use Soul Foundry for 2 mana (2m);
Sac the Perilous Myr for another charge counter and untap foundry;