Crimson_ink
So this water celestial might just be an elemental variant of his own bloodline, and it is so powerful that even with an impure bloodline Amelia has the potential of a legendary mage born with her mana gate open and Delilah has a higher stat limit on her body than Roy. Though now the we know a person can have multiple bloodlines I wouldn't be surprised if he gained Ninam's elven bloodline, heck maybe there would be another past life like that dragon mentioned a few chapters ago that would increase his physical body.