Wispweaver Angel, and Gigantoplasm

Prerequisites

• Wispweaver Angel on the battlefield
• Gigantoplasm in hand

Steps

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

Results

• Infinite creature ETB
• Infinite creature LTB