Black Tower
From Record Of Fantasy Adventure Venture
Tower located on the border of Polotsk and Novgorod.
Was built by the ancient wizard Koschei the Deathless, who used to reincarnate himself from a black egg every time he died but was eventually defeated and was seen no more.
The Byzantine Envoys hacked and found it inhabited by many Shadow Creatures and many shadow magic scrolls. Also, Prince Vselov was inside, just chillin'.
