uncommon illusion incapacitation shadow 

Traditions arcane, occult

Cast [>>] somatic, verbal

Range 500 feet; Targets one creature

Duration varies

You lash a target with tendrils of shadow that steal some of its substance, making it quasi-real. As long as it is quasireal, its Strikes deal half damage, it can't critically succeed at any skill check, and creatures attempting saving throws against its spells and effects get a result one degree of success better than they rolled. The target must attempt a Will saving throw.

Critical Success The target is unaffected.Success The target is quasi-real until the end of its next turn.Failure The target is quasi-real for 1 minute. At the end of each of its turns, it can attempt another Will save, ending the spell on a success.Critical Failure The target is quasi-real for an unlimited duration.

Extinction Curse #6: The Apocalypse Prophet, page 76.