Ashnod's Altar, Dross Scorpion, Mimic Vat, and Power Artifact

Prerequisites

• Ashnod's Altar on the battlefield
• Dross Scorpion on the battlefield
• Mimic Vat on the battlefield
• Power Artifact on the battlefield
• Power Artifact attached to Mimic Vat

Steps

1. Sacrifice Dross Scorpion to Ashnod's Altar, generating two generic mana
2. Imprint Mimic Vat with Dross Scorpion
3. Activate Mimic Vat for 1 mana, creating a token copy of Dross Scorpion
4. Sacrifice Dross Scorpion to Ashnod's Altar, and target Mimic Vat with its death trigger

Results

• Infinite colorless mana
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers