Intruder Alarm | Maskwood Nexus | Mishra, Eminent One

Cards

At the beginning of your combat phase,
Mishra triggers, creating a token copy of
Maskwood Nexus that is a 4/4 Construct with haste named
Mishra's Warform.
When
Mishra's Warform enters the battlefield,
Intruder Alarm triggers, untapping all creatures.
Activate any number of mana-producing creatures you control by tapping them, adding at least ({3} magic symbol) .
Activate
Mishra's Warform by paying ({3} magic symbol) and tapping it, creating a 2/2 Shapeshifter creature token.
When the Shapeshifter enters the battlefield,
Intruder Alarm triggers, untapping all creatures.
Repeat from step 3.
If creatures you control can tap to produce at least ({4} magic symbol) , this combo nets infinite mana.

This combo has been estimated to be Exhibition (Bracket 1+).