Gorthaur the Cruel is a Reactor Exclusive Mythic-Saber mutant which only can be obtained through the Mutants Fantasy Reactor collection. It is granted as a reward to players who collect all 5 mutants in the collection. It is unbreedable and cannot be upgraded.
Appears to be a red-eyed man wearing spiky armor with a ripped red cape hanging from his waist. He wields a massive hammer, which has a ring within a flame and two spikes at the end.
- Attack: Apocalyptical
- Life: Juggernaut
- Speed: Very Slow
All seeing eye
- ↑ Gorthaur holds his hand in the flame on his hammer, which turns into a fiery eye. Then rocks rise from the ground under the enemy. The same animation was first seen with Halbeard's "Rock Slide" attack.
- ↑ Gorthaur raises his hammer then slams it on the ground in front of the enemy. Once it hits the ground, a line of flames comes from the hammer and burns the enemy.
Although he inspires fear in his opponents hearts, few know the real face of Gorthaur. This former man was corrupted by demonic powers, urging him to conquer the world with an army of monsters.
- He's a clear reference to Sauron the main antagonist of The Lord of the Rings series and Morgoth from the same series. His name is also the same as Sauron's nickname.
- He's the strongest Exclusive Reactor mutant in terms of stats, even surpassing Robo Fuerte who is formerly titled as the strongest Exclusive Reactor mutant.
- He's also a reference to Reinhardt, one of the protagonists from Overwatch's videogame, because of his strong hammer and heavy armor.