Rosie Cotton of South Lane, and Herd Baloth

Prerequisites

• Rosie Cotton of South Lane on the battlefield
• Herd Baloth on the battlefield
• You have a way to put a +1/+1 counter on Herd Baloth

Steps

1. Put a +1/+1 counter on Herd Baloth
2. Herd Baloth triggers, creating a 4/4 Beast creature token
3. Rosie triggers, putting a +1/+1 counter on Herd Baloth
4. Repeat from step 2

Results

• Infinite +1/+1 counters on Herd Baloth
• Infinite creature tokens
• Infinite ETB