Felidar Guardian + Altered Ego

Prerequisites

• You have enough mana to cast Altered Ego.

Steps

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

Effects

• Infinite ETB
• Infinite LTB