Magnanimous Magistrate + Doubling Season + Pollenbright Druid + Phyrexian Altar

Prerequisites

• Magnanimous Magistrate has at least three reprieve counters.

Steps

1. 1Activate Phyrexian Altar by sacrificing Pollenbright Druid, adding one mana of any color.
2. 2Pollenbright Druid dies, triggering Magnanimous Magistrate, causing you to remove two reprieve counters from Magnanimous Magistrate and return Pollenbright Druid from your graveyard to the battlefield.
3. 3Pollenbright Druid enters the battlefield, causing you to proliferate, putting two reprieve counters on Magnanimous Magistrate.
4. 4Repeat.

Effects

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