Anticausal Vestige, Cloudstone Curio, and Dack's Duplicate

Prerequisites

• Anticausal Vestige on the battlefield
• Cloudstone Curio on the battlefield
• Dack's Duplicate in hand
• available

Steps

1. Cast Dack's Duplicate by paying its mana cost
2. Choose to have it enter as a copy of Anticausal Vestige
3. When Dack's Duplicate enters, Cloudstone Curio triggers, returning Anticausal Vestige from the battlefield to your hand
4. When Anticausal Vestige leaves the battlefield, it triggers, causing you to draw a card and and put Anticausal Vestige from your hand onto the battlefield
5. When Anticausal Vestige enters, Cloudstone Curio triggers, returning Dack's Duplicate from the battlefield to your hand
6. When Dack's Duplicate leaves the battlefield, it triggers, causing you to draw a card and put Dack's Duplicate from your hand onto the battlefield as a copy of Anticausal Vestige
7. Repeat from step 2

Results

• Infinite card draw
• Near-infinite ETB
• Infinite draw triggers
• Near-infinite storm count
• Near-infinite LTB