User blog comment:B214/Volume 23 discussion blog/@comment-1884090-20170411154430/@comment-10330822-20170411160406

He could probably fix the life consumption by overwhelming it with his demonic power. Remember, those swords are meant to be used by demons anyway, so that could be the secret. He doesn't have to naturally fuse his demon swords. Besides, that last option kind of sounds like a Choas Break.