Mage Tower

The Mage Tower is a tower found on the way from Mea to Gherra. It has 3 balconies and one room at its top. It is used to upgrade the Wizard to an Elemental Mage.

First balcony
The first balcony is extremely useful. It lets you enchant for FREE (up to level 8; even though it will show that you lost levels, as soon as you kill an enemy or get experience you will be the original level again) and store items you don't need at the moment (useful for socket gems). This makes it one of the places which you should really visit once you got half-decent gear.

Second and Third Balcony
None of the upper two balconies seem to have decent uses. There is a beacon on the second one, which cannot be activated however because there are no ore blocks under it.

Top room
At the room at the top, you can upgrade a Wizard to an Elemental Mage, assuming that you have reached level 30. Elemental Mages have extra Skills, get more Skill Points and can Level higher than a normal Wizard. They are also needed for Tertiary Classes.

Other uses
For travelling, the Mage Tower can be used to orientate yourself. Whenever you're near, you know you're on the right way to Gherra. The third balcony can also be used to see part of the map from above.