Rosie Cotton of South Lane, Barrenton Medic, and Presence of Gond

Prerequisites

• Rosie Cotton of South Lane on the battlefield
• Barrenton Medic on the battlefield
• Presence of Gond on the battlefield

Steps

1. Activate Barrenton Medic by tapping it, creating a creature token
2. When the token enters, Rosie triggers, putting a +1/+1 counter on Barrenton Medic
3. Activate Barrenton Medic by putting a -1/-1 counter on it, untapping it
4. Repeat

Results

• Infinite ETB
• Infinite creature tokens