Corpse Poison
The Silent Quibus didn't even look alive anymore. He looked like an amalgamation of flesh and blood, but the fury in Ryu's eyes didn't dissipate in the slightest. That wasn't because he felt that this wasn't enough, but because in all his fury, he still couldn't manage to shatter the man's bones.
The only attack that had managed to was when he reversed the connection he had with his corpse puppets. But even those shattered ribs had already healed. Even when he reversed the injuries Nemesis had given him, that hadn't managed to cause any damage.
Ryu didn't believe that this was because of some difference between the Fate Reversal coming from him versus several corpse puppets. It was instead because Silent Quibus had learned from the first and found methods to counter him somewhat.
And even now… he wasn't dead.
...