Barovia has long suffered under the rule of Count Strahd von Zarovich, but the evil that plagues this land extends well beyond the walls of Castle Ravenloft. See what keeps the good citizens of Barovia awake at night.
The isolated tower of the wizard Deros Frist is an example of a typical tsochari incursion into the human world. This short adventure site describes the lair of a tsochar noble that has successfully replaced Frist, a local wizard of some renown. The tsochar Yikk Tasst now pores through the wizard's libraries and spell books, eagerly absorbing all the arcane lore it can. Pgs. 130-134