two words, Ursa. Major.
1. Not cockatrice, the ursa is so big that it probably wouldn't be able to see it. So it can't look into it's eyes.
2. Not Quarray eel, because the bite probably feels like nothing to an ursa major.
3. not a dragon or a Hydra, because their lizards compared to it.
4. It's Got the three S's on it's side, Size, Strength, and Scary