Ren grasps the hilt of the dagger, and his sword shines for a moment.
“Curse Series… The Dagger of Mob Mentality?” (Ren)
So it comes down to that.
And wait, it’s a Curse Series?
There’s more than the 7 Deadly Sins?
I see, so this dagger makes one’s mind a single part of a whole and prevents an individual from making decisions on their own.