User blog comment:Miskos3/Fairy Tail 520: Dragon or Demon, Review/@comment-29874610-20170204151505/@comment-5303512-20170204232621

That is not the point, it is about the seed being demonic in nature, inert or not, which the temple should not allow him to enter, the dragon seed is still Draconic, besides it comes from DSM which gives the user the qualities of a dragon. There is no info on the Demon Seed being inert or part of Natsu in his entire life, this growth appeared after his battle with Zeref, even someone like Porlyusica or even Wendy would have picked it up, whether if there was a seed before the battle or if it was inactive still wouldn't matter since it is demonic and part of Natsu.

If you still think otherwise, show me where it was stated that the seed was with him his entire life.