Magnanimous Magistrate, Felidar Guardian, and Phyrexian Altar

Prerequisites

• Magnanimous Magistrate on the battlefield
• Felidar Guardian on the battlefield
• Phyrexian Altar on the battlefield

Steps

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

Results

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