Nothic

Nothics were one-eyed creeping monsters that lurked in places with great magical knowledge, which they themselves craved

Description
Nothics were the result of a curse befalling wizards who delved too deep into arcane knowledge. Once transformed, the nothic held no discernible memory of its former self, except for a faint notion that there might be a way to reverse its condition.[1]

Despite their deteriorated condition, nothics possessed an exceptional insight, and were capable of extracting knowledge and secrets from the minds of others.[1][3]