Wispweaver Angel, and Vesuvan Shapeshifter

Prerequisites

• Wispweaver Angel on the battlefield
• Vesuvan Shapeshifter in hand

Steps

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

Results

• Infinite ETB
• Infinite LTB