Updated.
Undetectable Lie is, apparently, the reverse of Detect Lie. So we might just make it that a deceiver genie's lies cannot be detected through discern lies (or give it a huge racial bonus on its Will save).
Here's Delude...
Delude
(Alteration)
Range: 0
Components: V, S
Duration: 1 turn/level
Casting Time: 3
Area of Effect: 30-ft. radius
Saving Throw: Neg.
By means of a delude spell, the wizard conceals his own alignment with that of any creature within a 30-foot radius at the time the spell is cast. The creature must be of higher than animal intelligence for the spell to work; its own alignment remains unchanged. The creature receives a saving throw vs. spell and, if successful, the delude spell fails. If the spell is successful, any know alignment spell used against the caster discovers only the assumed alignment. Note that a detect good or detect evil also detects the assumed aura, if the aura is strong enough. The creature whose aura has been assumed radiates magic, but the wizard radiates magic only to the creature whose alignment has been assumed. If a delude spell is used in conjunction with a change self or alter self spell, the class of the wizard can be totally hidden, if he is clever enough to carry off the disguise.
Here's Solipsism...
Solipsism (Alteration)
Sphere: Thought
Range: 10 yards/level
Components: V, S, M
Duration: Special
Casting Time: 1 round
Area of Effect: 100 sq. ft.+100 sq. ft./level
Saving Throw: Special
This unusual spell is similar to phantasmal force and other illusion magic, except that the priest who casts the spell is the only creature who automatically believes the results of the spell. The spell creates the illusion of any object, creature, or force, as long as it is within the boundaries of the spell's area of effect. The illusion is visual and tactile (that is, it can be seen and felt), but no other sensory stimuli are created.
Solipsism is the opposite of normal illusions in that anyone other than the caster must make an active effort to believe (rather than disbelieve) the illusion. Characters trying to believe the reality of a solipsistic illusion must make a saving throw vs. breath weapon, modified by the magical defense adjustment for Wisdom. A successful save means that the character believes the illusion and it is part of reality for him. A failed save means that the character cannot convince himself of the illusion's reality, and the illusion has no effect on him. A character can make a single attempt to believe each round.
Unlike true illusions, the image created by this spell does more than just duplicate reality. The image formed is real for those who believe in it. The illusion has all the normal properties that its form and function allow. Thus, a solipsistic bridge spanning a chasm could be crossed by the priest and those who believed. All others would see the priest apparently walking out onto nothingness. Likewise, a solipsistic giant would cause real damage to those who believed it.
The illusion remains in effect for as long as the priest continues to concentrate on it, until the priest is struck in combat, or until he is rendered unconscious. The level of concentration required is not extreme; the priest can move normally and may engage in combat, but is unable to cast any spell while maintaining a solipsistic illusion.
Solipsism can create only illusions that are external to the priest. Thus, the priest cannot create an illusion that he is the size of a giant, is unwounded, or has sprouted wings.
The material components are a lotus blossom that the priest must swallow and a bit of fleece.
It sounds a bit like shadow conjuration and shades, eh?