Magnanimous Magistrate, Icewind Stalwart, and Phyrexian Altar

Prerequisites

• Magnanimous Magistrate on the battlefield
• Icewind Stalwart on the battlefield
• Phyrexian Altar on the battlefield

Steps

1. Activate Phyrexian Altar by sacrificing Icewind Stalwart, adding
2. Magnanimous Magistrate triggers, allowing you to remove four reprieve counters from it and return Icewind Stalwart from the graveyard to the battlefield
3. Icewind Stalwart enters the battlefield, blinking Magnanimous Magistrate
4. Repeat

Results

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