User blog comment:Jopjopjop/Volume 20 Spoilers/@comment-162.205.216.169-20150709063502/@comment-1359322-20150711082237

A simpler solution, the Dragons with Samael, Fenrir with Gleipnir, all strong beings are bound to have some weakness. If Qlippoth use the Holy Grail they might as well know what 666's weakness is.