A good ways back there was another one of those "Oh boy, Elves! They're just the greatest ever!" threads (of the Edena_of_Neith stripe, memory serving). One of my comments was that I would find playing an awakened half-celestial gelatinous cube with cleric levels more interesting than just cooing over elves all the time.
Then Gez went and stated the critter up, class levels and all. After that, the cube sort of took on a life of its own including me convincing my GM to let me play 'em in a long running campaign after having lost my previous character. The in-game explination for Cube was that the temple the party was currently exploring used to be in the service of the gods of good back before the place was taken over by minions of nasty wicked evil, several decades ago. Unbeknownst to the badguys, this temple housed a particular relic that the party needed in order to bring about the downfall of said evil. Years back when the temple was first coming under assault, one of the upper-ranking clerics cast a
planar ally spell to get a guardian for the relic. What she got was Cube. The temple then later falls and gets minion-infested; the minions don't know about the relic or its guardian, all they know is that any time some of them go into a particular area, they disappear. They're not even sure the people that are gone are dead - they never find any blood or bodies, just a small pile of the missing ones armor and weapons... all perfectly clean. With no other idea of what's causing it, or what to do, they seal off that section of the temple by bricking all the entrances shut.
Cube can't dissolve stone, and in any case the relic seems to be safe for now... so it just hunkers down and waits. And keeps waiting for several years until the PCs come along, break down the seals and start poking around looking for the relic. There's a confrontation between the party and Cube in which it's revealed who the party is (non-minions) and why they need the relic. Cube agrees to let them take it, on the condition that he goes with them to ensure his charge is used properly and in the capacity they said it would be.
Heh, Cube was an absolute blast to play.
