Wraithform

When this spell is cast, the wizard and all of his gear become insubstantial. The caster is subject only to magical or special attacks, including those by weapons of +1 or better, or by creatures otherwise able to affect those struck only by magical weapons. Undead of most sorts will ignore an individual in wraithform, believing him to be a wraith or spectre, though a lich or special undead may save vs. spell with a -4 penalty to recognize the spell.

The wizard can pass through small holes or narrow openings, even mere cracks, with all he wears or holds in his hands, as long as the spell persists. Note, however, that the caster cannot fly without additional magic. No form of attack is possible when in wraithform, except against creatures that exist on the Ethereal Plane, where all attacks (both ways) are normal. A successful dispel magic spell forces the wizard in wraithform back to normal form. The spellcaster can end the spell with a single word.

The material components for the spell are a bit of gauze and a wisp of smoke.

Sage Advice

Dragon Magazine 264:

: Q: Exactly which plane is the subject of a wraithform spell on when the spell is in effect? If the subject is on the Ethereal Plane, why must he or she find a crack or hole in a barrier to pass through it? Also, do undead even realize the subject is alive, or do they invariably think the subject is an undead creature?

: A: The wraithform user does not leave the plane he or she is on when receiving the spell, though wraithform users on the Prime Material can reach into (and be reached from) the Border Ethereal—see the spell description.

: Undead creatures who encounter the wraithform user perceive the character as a wraith or spectre only if the undead have no reason to believe otherwise. Unintelligent undead never figure out the user's true nature. (If unintelligent undead have a reason to be hostile to the character, they probably attack even if they perceive the character to be a fellow undead creature). Likewise, intelligent undead are never fooled if they see the user in normal form and then witness the spell taking effect. Powerful intelligent undead, such as liches, gain a saving throw vs. spell at a -4 penalty to recognize a wraithform effect even if they have no reason to suspect that the user is not an undead creature.