Some of you probably know of the Zee core. The rarest material in the game with no use. I believe I have found a use for it. You are aware of the Battle sprites and the fact that they can pretty much eat them for upgrades and stuff. Well, imagine feeding one of them a zee core, all the special abilities it's likely to unlock.
This forum isn't really too important, I'd just thought I'd leave a little idea out there for people to see.
They can only be obtained from slooms. which are removed from the game. they're a collector's item.