Forneus wished to show all the outlanders the lost city, so that they can make their judgment as to they will continue aiding him.

[ This includes Jinx too. She's agreed to come here by her contract, but it's best that she sees up close what she's gonna deal with. Or that's what he thinks Forneus wants. ]

For now, there is no immediate danger that we must resolve. It is intended to be a time of rest and exploration.