Battlemage's Bracers, Vhal, Candlekeep Researcher, and Tidewater Minion

Prerequisites

• Battlemage's Bracers on the battlefield
• Vhal, Candlekeep Researcher on the battlefield
• Tidewater Minion on the battlefield

Steps

1. Activate Vhal by tapping it, adding at least that can't be spent to cast spells from your hand
2. Activate Tidewater Minion by tapping it, targeting Vhal
3. Battlemage's Bracers triggers, causing you to pay to copy Tidewater Minion's ability, targeting Tidewater Minion
4. Resolve both Tidewater Minion abilities, untapping it and Vhal
5. Repeat

Results

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