Looking for information on Anarch Tzimisce in V5

On the paradox wiki for V5 it mentions that there are as many Tzimisce in the Anarchs as there are in the Sabbat. Was wondering if anyone knows what book mentions this or where I can find more info. The campaign I have coming up swapped from a Camarilla campaign to an Anarch one, after a player vote, and I'd like to use it as my first time playing a Tzimisce.

Also, off topic but I don't want to make two threads if I don't have to. How does a Tzimisce gain Blood Sorcery in V5? I'd like to play a Koldunic Sorcerer but am unsure how to get dots in Blood Sorcery during character creation as a Tzimisce.