Phantasmal Image, and Wispweaver Angel

Prerequisites

• Phantasmal Image in hand
• Wispweaver Angel on the battlefield

Steps

1. Cast Phantasmal Image by paying its mana cost, choosing to have it enter the battlefield as a copy of Wispweaver Angel When Phantasmal Image enters the battlefield, it triggers, blinking Wispweaver Angel
2. When Wispweaver Angel enters the battlefield, it triggers, blinking Phantasmal Image
3. Choose to have Phantasmal Image enter the battlefield as a copy of Wispweaver Angel
4. Repeat from step 2

Results

• Infinite ETB
• Infinite LTB