Flesh Duplicate, and Wispweaver Angel

Prerequisites

• Flesh Duplicate in hand
• Wispweaver Angel on the battlefield

Steps

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

Results

• Infinite ETB
• Infinite LTB