Cast Mikaeus with X=0.
Mikaeus dies due to having 0 toughness.
Luminous Broodmoth returns Mikaeus to the battlefield.
Repeat for step 2 for a mandatory loop that draws the game.

Draw the game

Infinite death triggers

Infinite ETB

Infinite LTB

Luminous Broodmoth

Mikaeus, the Lunarch

Solemnity

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

Infinite proliferate

Magnanimous Magistrate

Norn's Choirmaster

Combos with "Mikaeus, the Lunarch"