Just picked up the Shadow Spells and skimmed through it this morning -- full reading later!

So, the Crystaline Entity -- new plot line? First I've heard of it, but I'm still catching up on my meta-plot / story-arc reading from the past edition or so. When I saw the name, I was thinking - oooh Obsidiman! - I know, I know no ED content integration, but they have thrown us a bone on occasion before. But, after reading it -- definitely a creature from a different meta-plane unrelated to Obsidiman. Anyway, just curious if this has been alluded to before...
The other part I found interesting was drawing power directly from the meta-planes

--- yowza, what a seemingly terrible idea! <gleeful GM hand rubbing>