I am currently standing outside Farious' Villa. I have already decided that I will kill Farious in this eternal dream so the two of us to awaken from the eternal dream.
Even if Farious did die in the real world when I killed him in the eternal dream, it wouldn't be that much of a problem for me. Even if I will feel guilt from my actions of killing Farious in the real world, I will be able to recover from it in just a few seconds.
Even if Farious did die, as long as his physical body only died, his soul would still be able to enter the cycle of reincarnation. The cursed wish-granting artifact seems to have no ulterior motives nor intentions of harming Farious since it granted Farious' wish even if it's only in an eternal dream.
It was more like the cursed wish-granting artifact only granted Farious' wish in an eternal dream because that is what it is only capable of. If it was capable of truly granting Farious' wish, it wouldn't have granted Farious' an eternal dream.