Mirrorhall Mimic // Ghastly Mimicry, and Wispweaver Angel

Prerequisites

• Mirrorhall Mimic // Ghastly Mimicry in hand
• Wispweaver Angel on the battlefield

Steps

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

Results

• Infinite ETB
• Infinite LTB