You create an area where psionic effects can not be initiated. The emanation is fixed with relation to the planet or plane it is cast on; it cannot be manifested on an object so that it can be moved about.
Any psionic ability triggered by someone or something in the damp, or that creates a non-instantaneous effect within the damp, automatically fails with no saving throw or power resistance roll allowed. However, permanent effects, previously-existing effects, or effects that are created outside the damp can be brought within it.
A Null Psionics Field or another Psychic Damp power that overlaps the area of an existing Psychic Damp causes no extra effect in the overlapping area.
If you are not using the "Psionics are Different" option, this power also blocks spells, spell-like abilities and supernatural abilities.