In my fantasy epic, the protagonist is a destined chosen one who will defeat the dark lord (at least that is what the sorcerer propaganda says.) About 3/4 into the story, he eventually meets the previous "chosen-one", who is now just a rogue mercenary who beats and kills people for money (or just for enjoyment.) At first he seems like that cool, edgy kind of character, only to subtly reveal that he is just an evil and malicious S.O.B.
For all of his crimes, atrocities, and acts:
- He abuses his given magic powers for.
- When he "rescues" a community, he ends up looting and pillaging them himself.
- He could have ended the war, but did not to get money.
- He has committed multiple war crimes (and never shows any remorse or guilt.)
- He views his own party and friends as disposable pawns.
- He attempts to physically and emotionally take advantage of the protagonist himself.
- Though not directly revealed, it's implied he has committed some form of rape.
- He has perverted fantasies; there are implications of bestiality, and he has committed voyeurism towards couples having sex.
- Overall, he has little to no redeeming qualities, and at no point will he get a redemption (or even try.)
I am writing him to be the kind of character who, despite just being horrific and evil, is still likeable and entertaining.
For a character that is really evil like this, how could I write them so that they are still enjoyable in the story?