Heavy Stiltrunner is a pure Sith lord. When he made his oath in the the Sith council he made a pledge to kill all Jedi. When he killed his first Jedi master he just wanted more. His master Reavan said "The power of the dark side shall bring you power and victory." From that moment forward he killed Jedi clones but then he thought of something. He thought that if he somehow told the clones they would be killed after the war they would join him and help! So Heavy killed one clone took his gear told Captain Rex that the clones would be killed after the war and Rex believed him. So Heavy showed Rex that he was a Zabrak and a Sith lord but Rex did not care. Heavy got as many clones as he could and marched them to the Jedi temple. Every Jedi was dead but one... Yoda. Yoda charged at Heavy but He