Board Thread:Questions and Answers/@comment-26330892-20151213200234/@comment-24108228-20151213214326

Deathwater is just an aesthetical item to make deathwater cave seem more spooky. It has no use.

We keep it secret because telling people where it is would result in us telling them where the mushrooms are, which do have a use. After all, how are we supposed to show off our extremely high farming levels if everyone else can also make giant mushroom farms?