Mazzy, Truesword Paladin, Phyrexian Altar, and Archon of Sun's Grace

Prerequisites

• Mazzy, Truesword Paladin on the battlefield
• Phyrexian Altar on the battlefield
• Archon of Sun's Grace on the battlefield

Steps

1. Activate Phyrexian Altar by sacrificing the creature with the Aura attached, adding one mana of any color
2. Mazzy's second ability triggers, exiling the Aura and allowing you to cast it until your next turn
3. Cast the Aura from exile by paying its mana cost, attaching it to any other creature you control
4. When the Aura enters, Archon of Sun's Grace triggers, creating a creature token
5. Repeat

Results

• Infinite ETB
• Infinite LTB
• Infinite death triggers
• Infinite sacrifice triggers
• Infinite storm count