In World of Warcraft Lore, four Old Gods created a giant and powerful creature. What was it called?

In the World of Warcraft lore, the four Old Gods created a colossal and formidable creature known as The Ancient One. This creature was crafted with immense power and was intended to serve as a guardian to the Old Gods' prisons, ensuring that their influence and control would remain secure and unchallenged. However, The Ancient One eventually broke free from its creators' control, becoming a terrifying force that threatened the very balance of Azeroth. As a result, heroes from different races and factions united to challenge and ultimately defeat The Ancient One, preventing catastrophe and preserving their world from its devastating might.