OMAC is one of the Blind Bag characters in LEGO Dimensions 2: The Rise of Enoch, from the DC Comics franchise.
Background[]
The OMACs (Omni Mind And Community) are a race of robots that can control human hosts. They were originally designed to monitor metahuman activity. However, they have since gone rogue following some reprogramming by the Justice League's adversary Maxwell Lord. They are controlled by Brother Eye.