I suppose he has a tight window of opportunity (just, going by fact not emotions); like the downtime for Hyeons "cooldown" ranges within hours if not days, but how long does the nullification work on Yiseon? That's unclear, so I'm not quite sure if "in front of Hyeon" factors in into his decision tree or if its just a byproduct of everything together.
And as far as I know, the dungeons disappear after they are cleared, so...
wait so Hyeon can't use his powers now?
As far as I understood, he's in his penalty phase now
Like before, when he had this deal going with Yiseon to use nullification on his undead friends (to undo Yiseons power) and they could only plan their next dungeon raids without using Hyeons shadow power (which might be the other reason this setup is convenient for Yiseon, otherwise Hyeon would've just gotten him up with his shadows)
That makes most sense honestly. Who is the manipulator now xD
I knew it when they put a distress warning right before this chapter... Now ml cannot even use his powers to save him. But damn yiseon ... must you do that in front of him...