Demon Golem

From WOiD Wiki

Demon Golems come into existence when a golem faces certain magical anomalies, which in some cases also grants the golem a degree of sentience. In nearly all cases, the process causes the golem to go berserk. Because of that, even those which don't show signs of aggression are hunted down and destroyed.

There has been some debate as to whether these golems should actually be labeled as demons, since in many cases they don't react as strongly to magic or sacred objects. On the other hand, a golem is vulnerable to any magic which is opposed to the magic that gave it "life." Technically, this could be considered a magical weakness.