A Slave Contract!

Before this, the old Spell Caster appeared to be on his last legs in the Flame Prison, but now a tremendous force shimmered around his body. In particular, the layer of flames covering him flared up violently, faintly repelling the flames of the Flame Prison.

This tremendous presence immediately froze Merlin where he stood. Nonetheless, Merlin did not bat an eyelid. On the Ship of Nikola, he was unafraid of anyone. Furthermore, they were in the Flame Prison. Not just anyone would be able to withstand the endless flames. The old Spell Caster was no more than someone who appeared stronger than he really was by forcibly radiating his presence.

Seeing that Merlin remained cool and collected with an unperturbed expression, the old Spell Caster, who seemed to have such vigorous force a moment ago, immediately turned dispirited. The surrounding flames wildly wrapped around him and a pained expression appeared on his face.