Chris stayed back because not only did he want to level up but also wanted to make a genuine excuse for the mission. Sure, the mission is not simple and the area is considered to be very dangerous but a mission must be completed, especially for him as the death card won't play as well as it does for others.
Within days he almost reached level 100 but stopped progressing much further. The attribute dungeon is of low grade and it would take a lot of time, so it is not of much use for him as of now. He wanted to find a new and knew exactly where to find it.
To find it, he had to go to his old starting zone, Storm Kingdom.
"It looks like I have to face my inner demons sooner than later", Chris muttered as he exited the Northern Mountains. He is on his way back to the Winter Kingdom's capital but he doesn't fly as he did back then, instead, he hunts the monsters on his way back to Frost City.