Z-Rex Concept for Game Project/Story

"The Zetadontosaurus rex, as it's known by it's full, but often never spoken name. Instead it is usually known by many other nicknames, as it is said to be a sin to say it's exact name to anybody, even if the mere purpose is explaining what exactly it is. It lives in a Spiritual World with a Prehistoric and Steampunk themed valley, with the only modern-looking structure at all being a massive Church from which a massive bell rings every dawn, which seems to be the only thing known to repel a Z-Rex, as conventional weaponry used by the natives are useless against it entirely, and all the Dinosaurs are dead worthless in aiding against trying to stop it without many lives being lost. Their mouths are fittingly called the "Gates of Hell", as their red glow, shared with their eyes, give off a sign to anybody devoured by them being sent to hell, no matter how many good deeds a person has done in their life. A bite from a Z-Rex is always fatal, as any limb torn off will cause all blood in the victim's body to forcefully flow out of the wound and kill the victim in an instant."
-Basic summary of the Zetadontosaurus rex.