Wizard Tower
Description in game:
Fear not - you are not the only practitioner of magic in this world. On your travels, you may well encounter a tall tower or two with a distinctive pointed roof. This is the residence of a fellow wizard.
Wizard towers are structures which generate at the surface throughout the overworld. Wizard towers are round, with pointed roofs and small windows, and can be found in a variety of shapes and sizes. These towers contain an arcane workbench, a number of bookshelves, torches and a wizard. Sometimes, they contain an evil wizard and a chest with magical loot instead of a regular wizard.

Generation
Wizard towers generate on the surface of the overworld. Their default spawn frequency makes them fairly uncommon, about as common as abandoned mineshafts.
Interior
Wizard towers contain a spiral staircase of wooden slabs leading up to the upper floor, where there is an arcane workbench and a number of bookshelves. The walls of the tower are lit with torches. A single wizard can be found inside the tower, and there is a 25% chance that this wizard will be an evil wizard. In towers with an evil wizard, one of the bookshelves is replaced by a chest containing magical loot.
