Cthugha

Cthugha is a Great Old One and Shub-Niggurath's second-in-command and possibly her love interest.

He is a major antagonist in Battle of Gods.

Physical Appearance
Cthugha resembles a reptilian magma creature with flames for hair, a semi-amorphous body, an orange orb attatched to his forehead, solid-rock armor, and a long tail.

Personality
Cthugha is a calm and collected individual, despite his literally hot exterior. He wants to exact revenge against Lightsen for his past actions like many other Great Old Ones and Outer Gods.

Cosmic Flame Control
Cthugha is able to manipulate flames that can burn in areas that fire would normally be extinguished, such as outer space or underwater. This allows him to burn even sea deities.

Superhuman Strength
Cthugha possesses strength that allows him to lift massive islands. He is able to fight an entire army with ease.

Superhuman Durability
Despite his partially liquid body, Cthugha is far from feeble in terms of toughness. He can survive many things like the crushing weight of planets.

Fire Wing Generation
Cthugha can manifest wings made of flames, granting him the Power of Flight that he otherwise lacks in order to travel places.

Shapeshifting
Thanks to his unique physiology, Cthugha can manipulate his magma body in a way that he can change shape.

Immortality
Cthugha is immortal and can never die of natural causes. However, he can be killed by extraordinarily powerful beings, such as Outer Gods or Arkeans.

Giant Form
Cthugha can transform into a giant creature, which is said to be his true form. Being a giant ball of flame, not only does his height and weight vary, he can also change his body into many things, such as a fiery tornado or a phoenix-like abomination.

Trivia

 * Cthugha is loosely based on a Lovecraftian cosmic entity of the same name.