Evolution Witness, Surge Conductor, Extruder, and Mana Crypt

Prerequisites

• Evolution Witness on the battlefield
• Surge Conductor on the battlefield
• Extruder on the battlefield
• Mana Crypt in hand

Steps

1. Cast Mana Crypt by paying its mana cost
2. When Mana Crypt enters, Surge Conductor triggers
3. Holding priority, activate Mana Crypt by tapping it, adding
4. Activate Extruder by sacrificing Mana Crypt, putting a +1/+1 counter on a creature
5. Resolve the Surge Conductor trigger, causing you to proliferate, putting a +1/+1 counter on Evolution Witness
6. Evolution Witness triggers, returning Mana Crypt from your graveyard to your hand
7. Repeat

Results

• Infinite +1/+1 counters on creatures you control
• Infinite artifact ETB
• Infinite artifact LTB
• Infinite artifact sacrifice triggers
• Infinite colorless mana
• Infinite proliferate
• Infinite storm count