Luminous Broodmoth + Felidar Guardian + Gravity Sphere + Ashnod's Altar

Prerequisites

—

Steps

1. 1Sacrifice Felidar Guardian to Ashnod's Altar to add .
2. 2Luminous Broodmoth triggers, returning Felidar Guardian to the battlefield with a flying counter on it.
3. 3Felidar Guardian's ETB triggers, exiling Mystic Decree and then returning it to the battlefield.
4. 4Repeat.

Effects

• Infinite colorless mana
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers