Vader hunting down surviving Jedi (including Master Jocasta Nu), the construction of Fortress Vader on Mustafar, and obtaining his signature red lightsaber.
There are two primary "Omnibus" collections that this file likely refers to, depending on the creator and timeline: Star Wars Omnibus - Darth Vader.cbz
A .cbz file is an archive (renameable to .zip ) containing sequential image files (usually JPEG or PNG) of the comic pages. Vader hunting down surviving Jedi (including Master Jocasta
Collects issues #1–25, Darth Vader Annual #1 , and the Vader Down crossover event. Darth Vader Annual #1
The "Year One" of Darth Vader, beginning immediately after Revenge of the Sith .