Prison!

"Wizard Setoh, previously I was in the boundless territory where I met Maya of the Golden Light Tribe. At that time, I hadn't become an Honored Legend, and was merely a Great Wizard!"

Setoh nodded. "Maya from the Golden Light Tribe? I know a little about him. The Golden Light Tribe is a weaker civilization but as they have an existence on par with an Honored Legend like Maya, they could just about survive in the Void Zone. Of course, though you weren't an Honored Legend, you were already close to one."

Naturally, Setoh knew about Merlin's capability. Despite not becoming an Honored Legend, Merlin would have been close to one. However, Setoh did not know that Merlin also had the empire-level warship of the Atlan civilization at that time, so Merlin was unafraid of Maya.