Vizier of Many Faces, and Felidar Guardian

Prerequisites

• Vizier of Many Faces in hand
• Felidar Guardian on the battlefield

Steps

1. Cast Vizier of Many Faces by paying its mana cost, choosing to have it enter the battlefield as a copy of Felidar Guardian When Vizier of Many Faces enters the battlefield, it triggers, blinking Felidar Guardian
2. When Felidar Guardian enters the battlefield, it triggers, blinking Vizier of Many Faces
3. Choose to have Vizier of Many Faces enter the battlefield as a copy of Felidar Guardian
4. Repeat from step 2

Results

• Infinite LTB
• Infinite ETB