Some background first. Elyan participates in a squad tournament where teams fight against each other to be honored the strongest warriors. Gremory is so confident that he can easily beat Elyan's team all by himself, so he solos the squad fight. After his team giving a few magical blasts to Gremory's direction, causing a huge cloud of dust, Elyan thinks Gremory is down, and says,
You're a fool to have come alone.
When the dust disperses, standing upright, Gremory mocks Elyan.
Weaklings such as yourself will only get in the way of the strong!
Why is 'yourself' rather than 'you' used here? This answer to an earlier question says,
The word "yourself" can be used to mean "you" in a in an honorific way.
(I just copied and pasted, the grammatical mistake is in the original answer.)
But this can't be the case here. Gremory disparages Elyan's team. The highly powerful Gremory actually is such an arrogant power-maniac who takes as his motto 'power can only be subjugated by even greater power, power that is feeble might as well not even exist'. He can't be talking to someone who is deemed as weak by himself in an honorific way.
Then, why is 'yourself' used here?