The Tarrasque's true origin is not known. Some say it is a creation of The Dark One. Others say The Four created it as a punishment for humanity's sin. Whatever its origin, it was the downfall of the Ancients. Its name carries so much terror that even werewolves recognize it.
The Tarrasque is said to be larger than most buildings. Its entire body is covered by a tough carapace that reflects most spells. It is said to be able to regrow lost appendages.
The Tarrasque also gives off a natural aura of fear that cripples any one who confront it.