The clones would continue to move closer together and box in the beast, they needed to shrink the barrier if it was going to fit.
Bocchiere himself observed the proceedings and listened to the beast's rage, "Let me tell you what I am." He called out as he took a knee, slamming one palm onto the ground.
Kuchiyose: Rashōmon Naraku!
A great fissure would crack the ground, racing forward from Bocchiere's placed hand and extending for hundreds of feet before coming to a stop. From there the ground before him would begin to crumble inward in two great sheets, as if they were great stone doors swinging open. They might not be, but it was not far from the mark. Once the ground had crumbled away it would reveal the cast open doors of a titanic Rashōmon gate, the demonic face adorning them split in half down the middle. Inside was not a hole in the ground beneath it but an empty endless void. Should the beast be cast inside it would have its soul (if it had one) torn from its body and both its body and soul would be locked in an eternal stasis, not living or dying, until Bocchiere deigned to release it.
As the creature was lowered toward its prison Bocchiere continued, "You're right about one thing, I am a tool of my god, but he is a god of Death. Not Light, not Darkness, just the End, and that is the one truth of this world. That it will end, and that is what I am. The bringer of The End. The Void. The Death of All."
He'd raise his hand toward the beast, the ring on his finger bearing the same mark as the beast's Noh mask.
"Zero. You don't even know what that word means. You're not Zero. Darkness cannot exist without Light and you are a being of pure darkness."
As the clones lowered the barrier, shrinking it enough that it could fit inside the Rashōmon gate, Bocchiere would be face to face with the creature.
"You wield a power many would lust for, but not I, for I know the truth. True power is found not in the light or the dark. Those who want power, true power, need only to embrace the inexorable. When nothing remains in this world, when the light is extinguished, and the dark is swept away, the only thing left, will be Zero."
With that the clones would lower themselves with the beast into the gate as Bocchiere watched, now silent. Once they were inside the gate would shut itself and activate the seal which would disperse Bocchiere's clones and seal the Reibi away. For the foreseeable future.