Sakashima the Impostor + Felidar Guardian

Prerequisites

• You have enough mana to cast Sakashima the Impostor.

Steps

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

Effects

• Infinite ETB
• Infinite LTB