Masterius

Old and powerful, as any lich is bound to be, there is a palpable aura of energy surrounding the Lich King.

Special abilities
Masterius has most of the usual undead immunities to critical hits, disease, level drain, ability drain, mind-affecting spells, paralysis, poison, and sneak attack. However, this creature lacks immunity to death magic.

Masterius' attacks stun on monster hit. He has three uses of aura of unnatural, and he has the following abilities (with a caster level of 15). Masterius is a level 40 wizard with the following spells prepared.