The 7 voices, each representing a distinct entity, declared altogether that they would kill Kahn/Byakuya after revealing their discontent as the Hero of Space was forced by the latter to use his Domain of Sacred Divinity.
Five of these entities were the Divine Spirits while two were the additional Demonic Spirits that Sasakibe Ryuken, the Hero of Space, contracted in his original world and were brought along with him.
His Divine Ability called Soul Possession, a favorable trump card in this case, allowed him to merge with these spirits in this world without any consequences unlike his home world, making it worthy of being selected.
Just the first form of the Shuten Doji alone was enough to slaughter dozens of saints all by himself. Because it contained the blood magic, space force, and Toranaga's eternal fire.
