THANATOS

Thanatos, the Deity of Destruction, was the tyrant who ruled Akrida before Locust came from space. He gained power by slaying all the Good Deities which guarded & protected the Akridian Civilizations centuries ago. He was even more evil and intelligent than locust himself. He stood at 395 ft (120m) tall. He terrorized a group of 3 friends who preceded the three brothers on Akrida: Dan, Baxtar, and Hector in 1971. He had the ability to fire a powerful beam of ice that was -200°F (-128.889°C) and behaved much like a normal beam, although it would encase anything it hit in freezing cold ice, and it would spawn huge ice crystals everywhere upon impact with the ground. He could also swing his MASSIVE tail that was covered in ice crystals and stalagmites at opponents, absolutely destroying everything in its path. Picture a giant flail or a trench club flying with a force equivalent to the Nagasaki bomb. 25,000 tons of force. That's 6x more powerful than F4's tail smash. You would think that it'd be known exactly what happened after the events of Origins, but we actually don't know for sure what happened to Thanatos, as he was never confirmed to be dead at any point. Theories range from him being killed by Space Locusts, him resting within the Akridian rocks the whole time dormant, or that he may have even just wandered off to another island entirely.

Additionally, Thanatos possesses Psychopathy, which explains his abilities to plan far ahead before he acts upon things, acting like a true killer towards anybody he goes after.