These leathery things with bone and metal jaws are known as snapjaw homunculi — both security and entertainment, they attack anyone except their master.
Speed 20 ft., fly 50 ft. (good)
During Combat The snapjaw homunculi attack intruders with their bear trap jaws. If an opponent succumbs to their poison, they switch to a new enemy.
Morale If reduced to fewer than 8 hit points, the snapjaw homunculi flee to join their master.
A snapjaw homunculus’s jaws can open very wide, giving its bite attack a ×3 critical multiplier.
Bite—injury; save Fort DC 13; frequency 1/minute for 60 minutes; effect sleep for 1 minute; cure 1 save.