Here are four canon facts about Darth Vader. Number one, Darth Vader was particularly skilled in both the she-in and de-gem-so variants of Form V of Light's Iber Combat. Furthermore, Vader was also adept in the use of Form IV, often incorporating the acrobatic techniques into his dueling style. Number two, after his cybernetic reconstruction, Vader's connection to the Force strengthened considerably to the point where Darth Sidious once complemented his powers as being unparalleled. Though his injuries had physically crippled him, Vader believed that the suffering that he experienced had both perfected his spirit and freed him from the needs of the flesh, allowing him to concentrate solely on his relationship to the Force. Number three, Vader was proficient and fluent in Hattis, the ancient Sith language, or Kitat, and he also understood the Bith language. And number four, after being tortured by Sidious and left unmoose-to-far to be hunted by the Sith-Assassin Ochi of Bastune, Vader repaired his armor using parts from the remains of battle droids, fought off Ochi, and then traveled to the hidden Sith planet Exigol, where he and Sidious fought each other by using the Force to control giant beasts before Vader agreed to yield to Sidious as his Sith apprentice.