Unstable Ooze - Medium Ooze (CR 5)

This is one I came up with for one of my games. They are one of those beasties that, for the characters in question, could be mistaken for a minor threat, but that I suspect, with a few rounds, could really put the hurt on folks if not dealt with properly.

I imagine these things to be boiling, fuming blobs of turbulent slime, slightly luminous and constantly emitting tiny burst of whatever element they are currently attuned to.

Like this, but completely different - these dudes always remind me of sick Kodama