Crystalline Crawler + Freed from the Real + Steel Overseer

U identity

Commander legal

The 3 combo pieces

What must be in place

Freed from the Real attached to Steel Overseer.
Steel Overseer does not have summoning sickness.

How to execute it

  1. Activate Steel Overseer by tapping it, putting a +1/+1 counter on each artifact creature you control.
  2. Activate Crystalline Crawler's first ability by removing a +1/+1 counter from it, adding {U}.
  3. Activate Freed from the Real's second ability by paying {U}, untapping Steel Overseer.
  4. Repeat.

What the combo produces