https://digilander.libero.it/diservizio/vtm/vtm04.html

"In nights past, the Tzimisce was among the most powerful clans in the world, dominating much of the region now known as Eastern Europe. Potent sorcerers, the Fiends dominated the region's mortals as well, in the process inspiring many of the horror stories about vampires. Clan after clan conspired to uproot the Tzimisce, but it was the sorcerous Tremere who finally succeeded. Indeed, as some tell the tale, the Tremere used captured Tzimisce vitae in their experiments to become immortal. For this, the Tzimisce hate the Tremere unrelentingly, and Tremere who fall into the Sabbat's clutches typically suffer a hideous end at the talons of the Fiends."