Oroku Saki (IDW)

Oroku Saki was a high-ranking member of the Foot Clan in feudal Japan. He orders that in addition to assassinating the lord they were hired to kill, they should wipe out anybody else they come across. Hamato Yoshi, another Foot Clan member, refuses, and Saki marks him for death. The Foot kills Yoshi's wife, Tang Shen, but Yoshi flees with his and Shen's four sons. Some years later, Saki and the Foot find Yoshi and his children, and slay them all. A mystical woman named Kitsune would grant a spell to make Oroku Saki an immortal. First he drank the mugegen and then impaled himself and put himself into a death like sleep. Then his and Kitsune's sons put him in a coffin to sleep for 100 years before their descendants woke him.

He died at one point and was resurrected by his decendant, Karai. He even encourages her to call him "grandfather". He is currently at war with Krang for dominating the world and is gathering as much forces as he can. Both the Shredder and Krang are after the mutant technology. He have a female arctic fox mutant in his army and after knowing of other mutants such as the turtles and their master he had Splinter kidnapped and offered him a place at his army. However, Splinter being a reincarnated Hamato Yoshi refused. So Saki ordered his followers to destroy him and when they he face him himself and was about to finish him. However, Splinter was saved by the turtles and Saki knows that they are the reincarnated children of Hamato Yoshi. The turtles make their get away but not before the promised that they will be destroyed.

Later, he was seen displaying his disappointment in Karai's development and tells her that he will find another second in-command.