Felidar Guardian + Gravity Sphere + Luminous Broodmoth + Phyrexian Altar

RW identity

Commander legal

The 4 combo pieces

• Felidar Guardian
• Gravity Sphere
• Luminous Broodmoth
• Phyrexian Altar

How to execute it

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.

What the combo produces

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