A veritable fortress built on the planet Oa, at the heart of the Green Lantern Corps, the Oan Sciencells were constructed to contain the most ruthless criminals in the universe.
With the recent rise of the Sinestro Corps and Red Lantern Corps, the sciencells currently hold such recent criminals as Lyssa Drak, Evil Star, and Vice as well as more ancient criminals such as the ex-guardian Krona. The Green Lantern Voz acts as warden of the sciencells.
Tier 2 Alert where Heroes prevent the escape of prisoners or Villains help inmates to escape. Access requires the Fight for the Light DLC.