The truth of The Organization

Cain's eye socket glowed with a dense red light as he witnessed how his bones, harder than an Adamantium Artifact, began to crumble to dust. It started with the finger on his hand and slowly made its way up.

If having his flesh melt was painful, the process of crumbling his bones to dust gave Cain the most excruciating pain of his entire life. It was an agony so intense that his mind urged him to stop the process immediately, and it would not be difficult since Cain knew that he just needed to resist for the Bone Calamity to be over, but that would also cripple his Astral Rebirth Path of Power.

The more his bones were destroyed, the stronger they would be upon reconstruction, and if he stopped before pulverizing every single one, there would always be a flaw left in his foundation that would haunt him in the future.