King definitely hiding his true intentions on why he would drag them into the seal , whether its ill or concerning for them its a lot to be revealed yet. Could it be he need them more powerful as to use them in some mass sacrifice, or he need them to unlock some hidden power within the seal. People who read the manga should know.

I'm suspicious of him as well, but we might find out the answer could be both, bad and good.

You have all the questions imma need them to hurry up and give the answers because this King is shady asf. He stood by while other powerful people dealt with his brother, same thing with his son who wiped out an entire village and lastly spared a demon. He's sus asf

Ofc as soon as they're about to level up something is about to pop off