User blog comment:Jopjopjop/Volume 20 Spoilers/@comment-24502975-20150721202457/@comment-200.115.204.49-20150723052159

Maybe the ending of v21 will show how the three factions use roseweisse seal formula on 666 but suffer heavy casualties trying to seal it and then 666 would wake up after a short time or a time skip (which i think would be anti climatic) or the seal will last for at least 2 more ln until it finnaly broke and dxd had to deal a massive attack against 666 and kill it once and for all