Myojin of Grim Betrayal, Blightbelly Rat, and Phyrexian Altar

Prerequisites

• Myojin of Grim Betrayal on the battlefield
• Blightbelly Rat on the battlefield
• Phyrexian Altar on the battlefield
• Myojin of Grim Betrayal has at least one indestructible counter on it

Steps

1. Activate Phyrexian Altar by sacrificing Blightbelly Rat, adding one mana of any color
2. When Blightbelly Rat dies, it triggers, putting an indestructible counter on Myojin
3. Activate Myojin by removing an indestructible counter from it, returning Blightbelly Rat from your graveyard to the battlefield
4. Repeat

Results

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