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

Prerequisites

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

Steps

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

Results

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