Intruder Alarm + March of the Machines + Shield Sphere + Soul Foundry

U identity

Commander legal

The 4 combo pieces

What must be in place

Soul Foundry does not have summoning sickness.
Shield Sphere exiled by Soul Foundry.

How to execute it

  1. Activate Soul Foundry by paying {0} and tapping it, creating a token copy of Shield Sphere
  2. When the Shield Sphere token enters the battlefield, Intruder Alarm triggers, untapping all creatures.
  3. Repeat.

What the combo produces