Barrenton Medic, Nurturing Presence, and Presence of Gond

Prerequisites

• Barrenton Medic on the battlefield
• Nurturing Presence on the battlefield
• Presence of Gond on the battlefield
• Born to Drive and Nurturing Presence attached to Barrenton Medic
• Barrenton Medic does not have summoning sickness

Steps

1. Activate Barrenton Medic by tapping it, creating a 1/1 Elf Warrior creature token
2. The Elf Warrior enters the battlefield, triggering Barrenton Medic, giving Barrenton Medic +1/+1 until end of turn
3. Activate Barrenton Medic's second ability by putting a -1/-1 counter on it, untapping it
4. Repeat

Results

• Infinite creature tokens
• Infinite ETB