How long will Dark be back?

So in chapter 237 we will see Dark and the priestess reunion in this small cabin where the 2 elemental girls hid Dark. Originally, she was going to cure with mental magic, but Dark's mind was already damaged beyond treatment and he was going crazy, the only thing she can do is slow it down.

Then we go back to monster invasion war which is kinda long, on the raw it;s still in going to 241 then brea so we don't know how long this war lasts

BIG SPOILER HOW WILL DARK BE CURED?
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The priestess help Dark to escaped in exchange for not to hate him for life. Then Artius (Dark's dad) came to see him and cured with his mental magic, so Dark was revived.

(Actually, that was unfinished, so Artien (Dark's grandpa) cast a spell called 'Relife',
and Dark regretted his past life, drank all day and night for three days, and woke up completely revived.)

KINDA SPOILER

at this point I think we're almost at the conclusion. The only things that's left is the monster war, Dark's revenge, some politcal stuff to discuss and Dragons Wrath ;)