to heal the debuff u need to pay 25k .-. **** cost alotWhen you die in dungeon you can choose to resurrect at the stone where you can heal off that debuff, then go back to the Dungeon tab and just teleport back in the dungeon. If you die many times, chances are, you won't get a good 'rank' on your dungeon anyway so there's no reason not to go heal off the debuff.
The idea, though, is that if you want the timer to 'matter' and get S rank, you probably can't really die all that much. I don't know how it's calculated but I know in WoW if you were doing mythic+ each death would be equivalent of 5 seconds lost on the timer on top of the time wasted waiting for the person to be rezzed etc. Can't wait for people to confirm exact requirements for S rank here.
I know..but the point is that it's too long, 15 mins, cost alot."Soul Sickness" (the name I'm used to) is a thing in many games. It's not that big of a deal once you get used to, however the masssive cost to remove it here is indeed a bit off.