The gravestone in AnR which Eren visits has an ouroboros, a snake eating it's tail symbolizing eternal cyclic renewal or a cycle of life, death and rebirth. : r/ANRime
Attack on Titan: Project Ouroboros (Upcoming Fan Ending) : r/titanfolk
Why do people on twitter feel the need to hate on this person's fanfic? Ouroboros has never even said anything bad and they're pretty low key. : r/AttackOnRetards