Evolution Witness, Surge Conductor, Umbral Collar Zealot, and Mox Opal

Prerequisites

• Evolution Witness on the battlefield
• Surge Conductor on the battlefield
• Umbral Collar Zealot on the battlefield
• Mox Opal in hand

Steps

1. Cast Mox Opal by paying its mana cost
2. When Mox Opal enters, Surge Conductor triggers
3. Holding priority, activate Mox Opal by tapping it, adding one mana of any color
4. Activate Umbral Collar Zealot by sacrificing Mox Opal, causing you to surveil 1
5. Resolve the Surge Conductor trigger, causing you to proliferate, putting a +1/+1 counter on Evolution Witness
6. Evolution Witness triggers, returning Mox Opal from your graveyard to your hand
7. Repeat

Results

• Infinite artifact ETB
• Infinite artifact LTB
• Infinite artifact sacrifice triggers
• Infinite colored mana
• Infinite proliferate
• Infinite storm count
• Infinite surveil