Mind Eating Beetles of Kalak-Nur (new monster + spell for old school D&D games)

"Many times the very intelligence of man causes him great difficulty and inefficiency when compared to the dumb, natural beast. A man will gut a fish and eat the flesh of its middle, while a ravenous bear will often simply bash the head open and suck out the brains. The bear receives more nutrition, and has no distaste for such activities. Many such of nature's little efficiencies can be found on