Prototype Portal, Dross Scorpion, Thermopod, and Cathodion

Prerequisites

• Prototype Portal on the battlefield
• Dross Scorpion on the battlefield
• Thermopod on the battlefield
• Cathodion in exile
• available

Steps

1. Activate Prototype Portal for , creating a token copy of Cathodion
2. Activate Thermopod's second ability by sacrificing Cathodion, adding
3. Cathodion and Dross Scorpion trigger
4. Resolve the Cathodion trigger, adding
5. Resolve the Dross Scorpion, untapping Prototype Portal
6. Repeat

Results

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