Battlemage's Bracers, Seeker of Skybreak, and Leafkin Druid

Prerequisites

• Battlemage's Bracers on the battlefield
• Seeker of Skybreak on the battlefield
• Leafkin Druid on the battlefield

Steps

1. Activate Leafkin Druid by tapping it, adding
2. Activate Seeker of Skybreak by tapping it, targeting Leafkin Druid
3. Battlemage's Bracers triggers, causing you to pay to copy Seeker of Skybreak's ability, targeting Seeker of Skybreak
4. Resolve both Seeker of Skybreak abilities, untapping it and Leafkin Druid
5. Repeat

Results

• Infinite untap of creatures you control
• Infinite green mana
• Infinite mana creatures you control can produce