Felidar Guardian + Spark Double

Prerequisites

• You have enough mana to cast Spark Double.

Steps

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

Effects

• Infinite ETB
• Infinite LTB