Gravelgill Axeshark, Luminous Broodmoth, and Phyrexian Altar

Prerequisites

• Gravelgill Axeshark on the battlefield
• Luminous Broodmoth on the battlefield
• Phyrexian Altar on the battlefield

Steps

1. Sacrifice Gravelgill Axeshark to Phyrexian Altar to add one mana of any color
2. Return Gravelgill Axeshark to the battlefield with the persist trigger, giving it a -1/-1 counter
3. Sacrifice Gravelgill Axeshark to Phyrexian Altar to add one mana of any color
4. Return Gravelgill Axeshark to the battlefield with the Luminous Broodmoth trigger, giving it a flying counter
5. Repeat

Results

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