Luminous Broodmoth, Felidar Guardian, Mystic Decree, and Phyrexian Altar

Prerequisites

• Luminous Broodmoth on the battlefield
• Felidar Guardian on the battlefield
• Mystic Decree on the battlefield
• Phyrexian Altar on the battlefield

Steps

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

Results

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