Fire shd not be it, because Spicy item (level 300) is already fire, and so is Crim item (level 335).
I would love for it to be water, but I have this (still very vague) dream where one day we can revamp Abyss and make a boss monster there; we can call it Kraken, and he would drop water item. But... that's just a vague dream for now, you know.
Omg..then someone would say..
Release the Kraken..