Horologium is a Celestial Spirit that is owned by Lucy Heartfilia. He keeps people safe within his clock body and he narrates for those inside him. He can be used in both non-combat and combat situation. Lucy uses him as shelter and transporter when traveling in snowy area. In combat, he can protect the person inside him with his hard-wooden body. However, beside defense purpose, Horologium does not seem to have combative moves. He is also mostly on a time limit whenever he is out and will transport back to the Spirit World once the time is up leaving his occupant behind, regardless of any danger they're in.

(Source: Fairy Tail Wikia)