Start DialogueYou try to fish out the submerged Spring Crest, but anything you place in the pool is immediately disintegrated.
This area the death crab was guarding has built up an intensely acidic poison over the years. Maybe something pure would counteract the effects?
In progress DialogueFor a pool this acidic, you're going to need a lot of purity.
End DialogueAs you dump the final jar of water into the basin, you notice that the water has become significantly safer. It may be years before the water is completely pure again, but at least for now it's safe enough to go in and grab the Spring Crest!
This basin is way too dangerous to put your hand in...it probably needs to be purified.
This basin is way too dangerous to put your hand in, and seems to dissolve anything placed within...it probably needs to be purified in order go grab the spring crest within.
After killing the Giant Death Crab and clicking its corpse, a pool is revealed. After leaving the room and coming back again, the Spring Crest, currently indicated by the game by a flat-coloured green circle, gives this quest.
To complete the quest, you need to have some number of Jars of Ultra-Pure water, perhaps only one. These are attained by taking Jars with pure water to Water Collectors in the dungeon.