User blog comment:B214/New anime 2017 discussion blog/@comment-97.86.117.132-20161230234256/@comment-29963364-20161231193704

I have to clarify something about Samael.

He doesn't have a "Cure-like Poison." He has a "Poison-like Curse." The curse acts like a poison, in that it breaks down and destroys the victim.

The Biblical God cursed Samael with his pure darkness and hatred. The cuse is effective against all beings  (that's the reason Samael was sealed in Cocytus). But since God hates Dragons & Snakes more than anything, the curse is more effective against them.