The logic behind Black Heaven

You're just having recurring nightmares about that boss fight.

Nah, it's just that each REAL story should have an ending. This one did, but only partly since the Lotus threat remains even after you kill him.

As Darkfaith pointed out, yeah, maybe it'd be a little unfair compared to the rest of the game's bosses. But they didn't make a 'story mode' for nothing. Maybe this should've been more "story" and less "maple" for once. Or they could've just explained to us the presence of a recurring Lotus. That's also the point of this thread: maybe someone who has completed the korean questline can tell us. Are there any interesting quests after the final battle in Black Heaven?

That aside, yeah, I also don't like his stronger post-storyline pay2win version