Lagrella, the Magpie, Felidar Guardian, and Essence Flux

Prerequisites

• Lagrella, the Magpie on the battlefield
• Felidar Guardian in exile
• Essence Flux in hand
• available

Steps

1. Cast Essence Flux by paying , blinking Lagrella
2. Lagrella leaves the battlefield, causing Felidar Guardian to return to the battlefield from exile
3. Lagrella and Felidar Guardian's enter-the-battlefield abilities trigger
4. Resolve the Lagrella trigger, exiling Felidar Guarrdian until Lagrella leaves the battlefield
5. Resolve the Felidar Guardian trigger, blinking Lagrella
6. Repeat from step 2

Results

• Infinite blinking
• Infinite ETB
• Infinite LTB