IG-72 was an early IG-series prototype created as part of Project Phlutdroid. Designed by Phlut Design Systems during the Clone Wars, he went unused until Phlut's assets were taken over by Holowan Laboratories, who implemented their designs early in the reign of the Galactic Empire. Like four near-identical IG-88 droids, IG-72 was intended to serve the Empire as an assassin droid and was due to be activated with the other droids on the planet Halowan. However, during a routine test, the first IG-88 downloaded a sentience program and came to life, killing all of the Holowan technicians. He activated each of the other models in turn, uploading his own programming into their droid brains, but IG-72 declined the offer, preferring to stay independent. The five droids eradicated all Holowan pers