Glasspool Mimic // Glasspool Shore, and Felidar Guardian

Prerequisites

• Glasspool Mimic // Glasspool Shore in hand
• Felidar Guardian on the battlefield

Steps

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

Results

• Infinite ETB
• Infinite LTB