Intelligent ooze

[Cleon]

You could of course, simply make an ooze intelligent. Bump up it's intelligence, use cunning tactics while playing it. Choose or make up a "language" for it that players can possibly use to communicate with it.

Yes, it could always be a previously unknown variant, or a unique creature like Darkness Given Hunger the Servant of Juiblex (which is basically a Black Pudding permanently possessed by a Hezrou).