Dr. Colossus is a limited-time character released on February 24, 2015, as part of Issue 2 of the Superheroes 2015 Event. He was the third and final prize to be won in the event's Issue 2. He re-released as a premium character on July 16, 2016, during Issue 2 of the Superheroes 2016 Event bundled together with the Death Mountain for 120 Donuts.