Pak is the most horrific abomination you could imagine. Even Lord Soth looks like a cute cub compared to him

Pak is a large, spheric chunk of tallow wich vaguely looks like an humanoid. With a large, pig-like snout and gleaming red eyes, even the most fearless pit fiend will have the shakes.

He is actually an intelligent creature : he is an excellent bluffer, knows how to intimidate better than a dozen hobgobelins berserkers and has a knack to manipulate everyone in his surroundings. Pak feeds himself by absorbing any living (or not) matter around him. He usually haunts the catacombs of the school he works in and where it passes for a teacher.

Combat
Pak prefers to manipulate and intimidate rather than fight. However, when cornered, he stops talking and starts fighting. Actually, he fights bad, but tries to take advantage of his abilities and spells. Like a boar (actually it looks like it), he fights even if reduced to -1 or less HP.

Aberrations have darkvision with a range of 60 feet.

Frightful Presence (Ex) Everyone in a 60-ft radius seeing Pak must make a Will save (DC 16) to avoid being afraid for 1 round.

Lich BellyButton (Su) Any living creature looking at Pak huge and gross belly button must make a Fortitude save (DC 15) or lose a level.

Spells (Sp) Pak can utter Power word, swear one time per day. The victim of this spell is instantly thrown out of Pak's classroom.

Acid (Ex) Upon being hit by a slashing weapon, Pak's fluids will burn all creatures adjacent to him. The fluids attack normally without bonuses.

Immunities (Ex) Immune to bludgeoning weapons, take half damage from slashing weapons.

Regeneration (Ex) Pak heals at the rate of 1 hit point per round.

Society
Pak is actually mind-controlling a college's department. It acts as he was a teacher.

This creature has been play tested.
This is a kender type creature.