This is my Demi-God baby, Phemius. His parents are a sea deity and and a sea serpent.

Phemius is technically dead. He had the ability to rebirth himself, when he died an egg would form inside his body, his serpent parent would then tear his body apart and pull the egg out, swallowing it until he was to hatch again.
He was killed when Atlantis was destroyed by the gods, there was someone inside he cared for that he wished to save. His desire to save this person caused him to accidentally annoyed the gods, so even though they were going to spare this person, they made Phemius take his place. Phem accepted, thinking he would be reborn as always, but they cursed him, so he would instead reincarnate. Each reincarnation suffers as part of the curse and it will keep repeating until certain conditions are met.