Gogo, Master of Mimicry, Vhal, Candlekeep Researcher, and Forensic Researcher

Prerequisites

• Gogo, Master of Mimicry on the battlefield
• Vhal, Candlekeep Researcher on the battlefield
• Forensic Researcher on the battlefield

Steps

1. Activate Forensic Researcher by tapping it, targeting Gogo
2. Holding priority, activate Vhal by tapping it, adding at least that cannot be spent to cast spells from your hand
3. Activate Gogo by paying and tapping it, copying the Forensic Researcher ability, targeting Gogo and Vhal
4. Resolve both copies of the Forensic Researcher abilities, untapping Gogo and Vhal
5. Repeat from step 2

Results

• Infinite untap of creatures you control
• Infinite mana creatures you control can produce
• Infinite colorless mana that cannot be spent to cast spells from your hand