Mikaeus, the Lunarch, Magnanimous Magistrate, and Norn's Choirmaster

Prerequisites

• Mikaeus, the Lunarch in hand or in the command zone
• Magnanimous Magistrate on the battlefield
• Norn's Choirmaster on the battlefield
• Magnanimous Magistrate has at least one reprieve counter on it
• plus enough mana to pay for commander tax, if applicable available

Steps

1. Cast Mikaeus either from your hand or from the command zone by paying plus commander tax, if applicable
2. Mikaeus enters the battlefield and dies as a state-based action due to having 0 toughness
3. Norn's Choirmaster and Magnanimous Magistrate trigger
4. Resolve the Norn's Choirmaster trigger, putting a reprieve counter on Magnanimous Magistrate
5. Resolve the Magnanimous Magistrate trigger, removing a reprieve counter from it and returning Mikaeus from your graveyard to the battlefield
6. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite proliferate