Now head back to the portal (the stone that’s glowing in the middle of the city) and the glass bridge should be made.I recommend grinding/training here until you reach lvl 20, cause the monsters are strong as fk; you should also be able to kill them pretty easily with your new gear as well. Most of my characters kill them with a normal attack – one hit at lvl 16. You should be able to level up really fast too since these monsters in the sky give a shit tonne of exp.