The Blue Obelisk as Rune-Encrypted Monolith

When Beedo told me about the Blue Obelisk, I first imagined it as Arthur C. Clarke's monolith from 2001: A Space Odyssey, particularly in its ability to transform an individual that encounters it. Upon comparing their definitions, however, I found them to be two different things- a monolith is often a geological feature made of a single massive stone, whereas an obelisk is a constructed monument, or in this case, a prison for alien intelligence. Here's my initial drawing; the final version, posted today on Dreams in the Lich House, is done in color.