"Do you really wish to know?" — Spoilers from the books and/or adaptations to follow!
In the darkest corner of the catacombs of the old manor, Azar Javed has set up his laboratory. It is from there that he directs his Salamandra operation, using the telecommunicator that is also within and conducts his nefarious experiments. It is not the easiest place to access, being guarded by mutants, greater mutants, mutant assassins, armored hounds, greater brothers and a koshchey.
After battling his way through this gauntlet, Geralt finally faces down the mad mage and ends his reign of terror once and for all. It is over... but is it? Who is that in the mirror? It appears that Javed was taking orders from even higher up, the Grand Master of the Order of the Flaming Rose, Jacques de Aldersberg himself.