Cuberos

Cuberos (キュベリオス Kyuberiosu) is a giant snake owned by a member of Oracion Seis, Cobra.

Appearance
Cuberos is very long and very big snake. His back is covered by a violet scales an egg shell-colored belly. His eyes are green, but with red pupils. Cuberos almost always is in his snake form, but in the battle, he can spread a pair of bat-like wings, which allows Cobra to use him as a flying means of transportation.

Magic and Abilities
Cuberos doesn't use magic in battle.

Other
Poison Bite: Cuberos is very poison snake, one of his bites could kill a person. Cobra said, that death from it's poison is very slowly and painful. It almost killed Erza Scarlet.

Posion Mist: Cuberos can transform his poison in to a mist, which is a food for Cobra.

Trivia

 * Cobra's prayer directly affected Cuberios, he only wanted to be able to talk with him.