Ed and Crimson

Ed and Crimson is the 6th episode of season 5 where Ed creates a masked face painted superhero alter ego known as Crimson and no one knows his secret execpt Rigby, Eddy, Double D and Johnny 2X4 and they promise not to tell them his secret while Nazz discovers that she has a mystic super power and they use it to defeat the allmighty Relikcor and Rock Mobber

Triva
Kevin is reaveald to be the villian because in one scene he seen puting the mask of Relikcor,but no one unmasked him.