Another favourite of mine, this time from the 1st Edition Fiend Folio - The Hook Horror!
NO. ENCOUNTERED: 1 (2-4)
MOVE: 22 ft
ATTACKS: 2 (talons) 1D8
XP: 90+5 per HP
Large, powerful bipeds, hook horrors have vulture-like heads and a hard plated exoskeleton which is mottled grey in colour.
They inhabit deep underground corridors and chambers.
Though their vision is very poor, their hearing is extremely acute and there is only a 10% chance of surprising a hook horror (characters intending to ambush a hook horror never have a difficulty to beat of lower than 19+, no matter how skilled they are or what the circumstances might be). The creature's arms end in sharp hook-like talons which it uses in melee, each inflicting 1-8 hit points of damage.
A hook horror cannot speak but communicates with others of its kind by making clacking noises with the exoskeleton - an eerie sound which can alarm the unwary as it echoes around dungeon corridors.