Thailog is a clone created by David Xanatos. Cloned from Goliath but programmed by Dr. Sevarius (under Xanatos's direction) to see things through Xanatos's eyes, Thailog is powerhouse of intellect, strength and cunning. Inheriting his creator's greed and lust for power, the clone tricked and schemed 20 million dollars out of Xanatos by faking his own kidnapping. He tried to destroy his trio of "fathers", Xanatos, Sevarius, and Goliath, but was foiled. He did however manage to fake his own death and get away with the money.
Pairing his money and himself with Demona next, they created the company Nightstone and plotted together to get Macbeth to marry Demona's human alter-ego, Domeniqe, so that they could steal his fortune. Unbeknownst to Demona however, Thailog planned to have to two fight and destroy eachother, therefore leaving him with all the money. He was stopped by Goliath, Eliza and Angela. Even though the three told Demona of Thailog's manipulations the soceress stayed with him.
Thailog next decided that he needed a clan of his own and working with Demona, created the Clone Clan, Burbank, Malibu, Brentwood, and Hollywood. He pitted them against the Manhattan clan, nearly defeating them. He also created himself a new mate, one he thought mor suited to hime then Demona whom he thought to unstable. Deliah, a clone with attributes of both Demona and Eliza Maza along with a healthy dose of submissiveness, tried to kill Angela under Thailog's orders. The final straw, Demona and Thailog fought viciously until both were seemingly destroyed by fire.
Thailog resurfaced during the Golaith Chronicles suffering from clone degeneration.