Level: Nomad 6
Display: Auditory and material
Manifesting Time: 1 standard action
Range: Close (25 ft. + 5 ft./2 levels)
Targets: One or more extraplanar creatures, no two of which can be more than 30 ft. apart
Duration: Instantaneous
Saving Throw: Will negates
Power Resistance: Yes
Power Points: 11
This power enables you to force extraplanar creatures out of your home plane. As many as 2 Hit Dice of creatures per manifester level can be banished.
Psions gain no benefit from presenting objects or substances that the target hates, fears, or otherwise opposes, as casters of the banishment spell do.
Augment: For every 2 additional power points you spend, this power’s save DC increases by 1 and your manifester level increases by 1 for the purpose of overcoming power resistance.
Source: Expanded Psionics Handbook, page 80. Inserted the one sentence from the referenced banishment spell that didn’t mention the items that psions can’t used as mentioned in the power description’s second paragraph.