Thaddius Blakk is the evil owner of Blakk Industries.
His business dealings have made him a rich and powerful man. Ultimately, his business is hiding his true purpose: to control all of Slugterra and destroy the magical slug energy that protects this underground world. A powerful Slugslinger with a terrifying multi-shot Harbinger Firestorm blaster, Blakk has corrupted his Slugs through the dark science of ghouling, turning them into ruthless shadows of their former selves.
Thaddeus Blakk grew up dreaming of becoming the top Slugslinger around. He was also a candidate for becoming a student of the Unbeatable master but he lost to Will Shane. He would do anything to win, even cheat. This didn't sit well with his chief rival, Will Shane. After he defeated Will Shane, Blakk retired from Slugslinging uncontested and turned his interest to science and industry. Blakk took a broken-down train system and turned it into the Slugterran Express, a system of high-tech, high-speed trains that connect all but the most remote caverns. Despite his success and wealth, Blakk remained unsatisfied. Now, he will settle for nothing less than total domination of all Slugterra.