Synth Infiltrator, and Wispweaver Angel

Prerequisites

• Synth Infiltrator in hand
• Wispweaver Angel on the battlefield

Steps

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

Results

• Infinite ETB
• Infinite LTB