Moreau's Golem only appears in the Blood and Wine expansion.
Bestiary entry[]
Long years of solitary study tend to make mages somewhat eccentric. As the years pass, laypeople being to irritate them more and more: they are dense, unreliable, disobedient and determined not to understand the gravity of mages' work. They display emotion when they should show discipline and self-mastery. No wonder mages have long considered the best companions to be artificial constructs they themselves bring to life and design to follow their orders and meet their needs. Professor Moreau was no exception in this regard. His golem was his dutiful servant and companion, in good times and bad. Moreau's golem was also an excellent guardian: massive, unyielding and devilishly strong. All in all, he was a tough nut for a witcher to crack!