Evolution Witness, Surge Conductor, Mana Vault, and Megatog

Prerequisites

• Evolution Witness on the battlefield
• Surge Conductor on the battlefield
• Mana Vault in hand
• Megatog on the battlefield
• available

Steps

1. Cast Mana Vault by paying its mana cost
2. When Mana Vault enters, Surge Conductor triggers
3. Holding priority, activate Mana Vault by tapping it, adding
4. Activate Megatog by sacrificing Mana Vault, giving Megatog +3/+3 until end of turn
5. Resolve the Surge Conductor trigger, causing you to proliferate, putting a +1/+1 counter on Evolution Witness
6. Evolution Witness triggers, returning Mana Vault 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
• Infinitely large creature until end of turn