Clone Army from the cloners of Kamino.
George Lucas originally intended for Sifo-Dyas to be an alias for Darth Sidious, but he changed plans while working on the script of The Clone Wars, where it was revealed he had ordered the clones and subsequently been killed by the criminal empire called the Pykes.
Cavan Scott's audiobook Sith were about to return. Kostana, of course, was right; at pretty much the same time, a Nabooian politician named Palpatine was beginning to build s with the Jedi Council.
Master Kostana encouraged Sifo-Dyas to experiment with the Cosmic Force, an aspect of the Force that is focused on visions of the future. In general, the Jedi of the Prequel Era had neglected this aspect of the Force; Master Yoda, in particular, argued that aggressively attempting to sense the future was a vain attempt to control it, and thus an expression of the dark side. In the case of Sifo-Dyas, exposure to the Cosmic Force left him forever vulnerable to spontaneous, uncontrollable visions of the future. Although Sifo-Dyas became a Jedi Master, he clashed with the Jedi Council on many occasions, particularly under the influence of these visions. He began glimpsing a coming war, and argued that the Jedi needed an army.
After all these years, the mystery of Sifo-Dyas has at last been explained. The Clone Wars fills out the last details, confirming that Sifo-Dyas went rogue and commissioned the Clone Army without the Council's knowledge. Unfortunately for the prescient Jedi Master, his actions were discovered by the Sith, and Palpatine integrated the Clone Army into his plans. Concerned that Sifo-Dyas' abilities made him a threat, Darth Sidious ordered his new apprentice to have Sifo-Dyas killed. And so it was that, in the end, Sifo-Dyas was targeted by a crime cartel who had been paid by none other than his childhood friend - Count Dooku himself.
