Metastatic Evangel, Cloudstone Curio, and Herd Baloth

Prerequisites

• Metastatic Evangel on the battlefield
• Cloudstone Curio on the battlefield
• Herd Baloth on the battlefield
• Herd Baloth has at least one +1/+1 counter on it

Steps

1. Cast the creature by paying
2. When the creature enters the battlefield, Metastatic Evangel triggers, and Cloudstone Curio triggers if the creature was not an artifact
3. Resolve the Cloudstone Curio trigger, if applicable, choosing to return nothing to your hand
4. Resolve the Metastatic Evangel trigger, causing you to put a +1/+1 counter on Herd Baloth
5. Herd Baloth triggers, creating a 4/4 Beast creature token
6. When the Beast enters the battlefield, Cloudstone Curio triggers, returning the creature with mana cost from the battlefield to your hand
7. Repeat

Results

• Infinite +1/+1 counters on Scurry Oak
• Infinite creature tokens
• Infinite ETB
• Infinite LTB
• Infinite proliferate
• Infinite storm count