Moritte of the Frost, and Wispweaver Angel

Prerequisites

• Moritte of the Frost in hand
• Wispweaver Angel on the battlefield

Steps

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

Results

• Infinite ETB
• Infinite LTB