Technomancer, Machine God's Effigy, and Umbral Collar Zealot

Prerequisites

• Technomancer on the battlefield
• Machine God's Effigy in hand
• Umbral Collar Zealot on the battlefield
• available

Steps

1. Cast Machine God's Effigy by paying
2. Choose to have it enter the battlefield as a copy of Technomancer
3. When Machine God's Effigy enters, it triggers
4. Holding priority, activate Machine God's Effigy by tapping it, adding
5. Activate Umbral Collar Zealot by sacrificing Machine God's Effigy
6. Resolve the Machine God's Effigy trigger, causing you to mill three cards and return Machine God's Effigy from your graveyard to the battlefield as a copy of Technomancer
7. Repeat from step 2

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite self-mill
• Infinite blue mana
• Infinite surveil 1
• Put all artifact creature cards with mana value 2 or less from your library onto the battlefield
• Put all artifact creature cards with mana value 2 or less from your graveyard onto the battlefield