Requires

Phyrexian Triniform must be in exile (exiled by Mimic Vat). Clock of Omens must be on the battlefield. Mimic Vat must be on the battlefield. Ashnod's Altar must be on the battlefield. Mana needed:

Steps

1. Activate Mimic Vat by paying and tapping it, creating a token copy of Phyrexian Triniform with haste.
2. Activate Ashnod's Altar by sacrificing the Phyrexian Triniform token, adding .
3. The token Phyrexian Triniform dies, creating three 3/3 Golem artifact creature tokens.
4. Activate Clock of Omens by tapping two Golems, untapping Mimic Vat.
5. Activate Ashnod's Altar by sacrificing a Golem, adding .
6. Repeat.

Results