Both bloodlusted. Fight is in a deserted arena. In the novels Starkiller barely survived against his fights with Vader, and apparently Starkiller only won the 1st one because Sidious was amping him and Vader didn’t want to kill him because he saw him as a son. The 2nd fight Vader just gave up so that his own goals can be completed. Does anyone know the full details? If this is all true then a blood-lusted Vader should rape