Board Thread:Questions and Answers/@comment-32959895-20170827030830/@comment-78.194.252.210-20171001141048

He inherit it forum thetis, because she was herself a minor divinity (daughter of Nérée). Peleus himself had a few divine blood, however too far to be noted. He took it enterely from her mother and the fact that she "consume her humanity" to make him immortal.

Finally resulting in only his invulnerability, well, he wasn't too far.