Mage Tower (Warcraft II)

Serpentine spires of living rock form the foundation of the Mage Towers where glowing spheres of mystic energy serve to replenish and focus the awesome magiks wielded against the Orcish Horde. These Towers hold ominous secrets that none but the Mages of Lordaeron dare to explore. As extensions of the Violet Citadel in Dalaran, these towers allow the Mages to research arcane spells, unfettered by the affairs of the temporal plane.