Shax

Shax is the arch demon of illusions, dreams and magic. He casts spells as a 24th level sorcerer and can work any Illusion or Enchantment spell at will at 24th level; his illusions are so strong that every save against them is made at -4. Magical attacks do only half damage to him. On his own plane he has a body, but when summoned to the material plane he always appears as a ghostly, shadowy mist, and his real shape is said to be so indescribably hideous that anyone who sees it and fails to resist goes mad forever. He never fights physically, relying instead on his sorcery and his ability to turn ethereal whenever he likes.

His spectral form gives off a magic that fills everyone within twenty feet with powerful hallucinations; those who fail a save vs INT perceive only what Shax chooses while they remain near him. Many evil illusionists, magicians and sorcerers revere him for his mastery of illusion and his knowledge of every spell.

When properly summoned, Shax offers a single wish or will teach the summoner any single spell. If the offering is not good enough, he makes the summoner look upon his true form and then returns home at once.