Trapjaw Kelpie, Luminous Broodmoth, and Phyrexian Altar

Prerequisites

• Trapjaw Kelpie on the battlefield
• Luminous Broodmoth on the battlefield
• Phyrexian Altar on the battlefield

Steps

1. Sacrifice Trapjaw Kelpie to Phyrexian Altar to add one mana of any color
2. Return Trapjaw Kelpie to the battlefield with the persist trigger, giving it a -1/-1 counter
3. Sacrifice Trapjaw Kelpie to Phyrexian Altar to add one mana of any color
4. Return Trapjaw Kelpie 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