Evolution Witness, Surge Conductor, Umbral Collar Zealot, and Grim Monolith

Prerequisites

• Evolution Witness on the battlefield
• Surge Conductor on the battlefield
• Umbral Collar Zealot on the battlefield
• Grim Monolith in hand
• available

Steps

1. Cast Grim Monolith by paying its mana cost
2. When Grim Monolith enters, Surge Conductor triggers
3. Holding priority, activate Grim Monolith by tapping it, adding
4. Activate Umbral Collar Zealot by sacrificing Grim Monolith, 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 Grim Monolith from your graveyard to your hand
7. Repeat

Results

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