In fact, signing the Soul Contract was tantamount to planting a spell in Rafael Case's mind; Yusuf Zuck could manipulate Rafael's life and death with just a thought.
When Rafael had just recovered, he still looked icy and shouted sternly, but as soon as Yusuf shifted his Telekinesis, Rafael submitted instantly under the intense pain in his soul.
This was initially a cowardly man, no hero, so he feared death deeply. Even after Yusuf withdrew his Telekinesis, he still lay on the ground shivering, his eyes filled with immense terror, looking at Yusuf as if he had seen a ghost.
"Get up and continue bathing," Yusuf cursed angrily, immediately hooking his finger around the collar on his neck and giving it a fierce tug; the collar snapped off with a 'pop'.
"Wow–" as the collar broke, Rafael spat out a mouthful of blood, then lay on the ground like a dead pig, screaming for mercy.