The Treasury!

The moment the ghastly monster's marble-like heart went down his throat and into his stomach, the badly damaged demonic heart that had taken roots in the pits of his stomach released a strong suction force.

"Fuck!"

It was so strong that he felt his stomach contracting. He felt pained. Thankfully, after pulling the monster's heart towards itself and devouring it, the demonic heart stopped releasing the suction force.

King Wrath barely felt at ease when a contorted expression appeared on his face.

Misfortune always strikes in pairs!

"Shit!"

Right after, King Wrath felt searing pain all over his body. It was as if someone was using a hot hammer to smash every inch of his body again and again. He didn't know how long he had to endure this pain. But when he stopped feeling it, sweat covered him from head to toe, and he felt wriggling all over his body.

What could it be?