In the Manga, the key is depicted to be a golden key with the crest of the Golden Bull, a circle with two horns sprouting on either side, stamped on its bow. In the Anime, the key is still depicted as gold but is designed more intricately. A head of a bull is carved in the base of the bow with two horns sprouting out on its side, surrounding a white center with the crest of the Golden Bull, colored in black. The blade of the key is designed similar to that of a two-sided axe, each side designed with an S facing the opposite direction. The blade then finishes off with a pointed tip. The manga has commenced depicting Taurus' key similar to the anime's design.
While in possession of the key, a Celestial Spirit Mage may be able to summon the Golden Bull Taurus by reciting the quote, "Open the Gate of the Golden Bull! Taurus!". This summons Taurus, a perverted humanoid bull wielding a giant Labrys.
- Fairy Tail Anime: Episode 2
- Fairy Tail Manga: Chapter 271, Page 8
- Fairy Tail Manga: Chapter 3, Page 10