User blog comment:FairyRaven/Fairy Tail Chapter 329: Seven Dragons, Review and Commentary/@comment-49.176.34.76-20130430152649/@comment-203.87.139.100-20130430154612

filler or not, KotSS will be a good source why Cobra has a scar on his left eye. :)

KotSS is a half filler. Michelle, which is a main character in the arc, was never mentioned in the manga, but seeing the scar in cobra's left eye is just a proof that Zentopia DID happened. :) too bad for the manga readers asking "what happened to cobra's ears and eyes." etc.