Intruder Alarm + March of the Machines + Undercity Scrounger

UB identity

Commander legal

The 3 combo pieces

What must be in place

Undercity Scrounger does not have summoning sickness.
A creature has died this turn.

How to execute it

  1. Activate Undercity Scrounger by tapping it, creating a Treasure token.
  2. The Treasure token enters the battlefield as a 0/0 artifact creature, and therefore dies as a state-based action due to having zero toughness.
  3. Intruder Alarm triggers, untapping all creatures.
  4. Repeat.

What the combo produces