A Demon Seed (竜の種 Akuma no Tane) is a plant-like organism that is located inside the body of a Etherious, being the proof of a demonic entity.


Like its counterpart in a Dragon Seed, it is implied by Igneel that it causes the process of becoming a Demon, as well as the proof that something is demonic.[1]


  1. Fairy Tail Manga: Chapter 516, Pages 11-12
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