Rosie Cotton of South Lane, and Scurry Oak

Prerequisites

• Rosie Cotton of South Lane on the battlefield
• Scurry Oak on the battlefield

Steps

1. Put a +1/+1 counter on Scurry Oak
2. Scurry Oak triggers, creating a 1/1 Squirrel creature token
3. Rosie triggers, putting a +1/+1 counter on Scurry Oak
4. Repeat from step 2

Results

• Infinite +1/+1 counters on Scurry Oak
• Infinite creature tokens
• Infinite ETB