https://hkmdb.com/db/movies/view.mhtml? ... ay_set=eng

If no one objects I'll change the main English title in MAGIC SWORDS like on that original poster:

https://hkmdb.com/db/movies/image_detai ... ay_set=eng

That poster shows the same chinese title 神劍魔劍 like in the opening credits and the Korean poster.
The BETRAYER title is only on that image with different chinese title 叛賊 (maybe a re-release) :

https://hkmdb.com/db/movies/image_detai ... ay_set=eng

That is the reason why I think MAGIC SWORDS fits more as main English title.

I agree. Betrayer (叛賊) seems to be the first Singapore release title. (1973)

I have now changed the main English title.