Ivory Tower Wizard Carsus:
My name is Carsus, and I am an investigator dispatched from Ivory Tower. We've finished our work at the upper layer of the tower, and are ready to move onto the lower layer.
We're installing an elevator to the 3rd basement floor. Up to this point, we've used magic, but it's an unpredictable system at best, so an elevator seemed much safer.
On the 1st basement floor, you will see a raid boss that controls the entire Cruma Tower. You can go there through Ivory Tower Wizard Ian who you can find in a remote area of the 2nd basement floor.