What is the Harmless Red Cube?

I keep finding this cube in the dungeon. But I can never interact with it. Is there a purpose to it, or is it just some Easter Egg?
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Solution 1:

According to the Steam forums, this doesn't appear to serve any purpose within the game. However, it might be a reference to one of the game's beta testers:

I'm relatively (90%) sure it's a reference to DeadlyRedCube, an IRC regular, beta tester, and game developer who is friends with the devs of Dredmor

So it seems to just be a nod to a friend.