The kalashtar psions of Adar have mastered a power that disrupts telepathic communication. They discovered in practice that it could be used as a weapon against the quori spirits that hunt them.
Suppress schism interferes with powers and effects from the telepathy discipline. When you manifest this power, you make a dispel check (1d20 + your manifester level, maximum +15) against each ongoing telepathy power in effect on the target creature. The DC for this dispel check is 11 + the power's manifester level. If you succeed on a particular check, that power is dispelled; if you fail, that power remains in effect.
In addition, if the target fails a Will save, any form of dual mind in effect is disrupted for the duration of the power, including the effect of the schism power, an Inspired's dual mind ability, a kalashtar's +2 bonus on saving throws against mind-affecting spells, powers, and abilities, and host feats.
If the target is a possessed creature, the possessing mind must succeed on the save or become suppressed for the power's duration, in which case the target creature can act normally. Because the Inspired are possessed creatures, using this power against them requires the quori spirit to first save against begin suppressed. On a successful save, the Inspired must then save against the disruption of the dual mind ability.
On a failed save, if the target creature attempts to manifest a telepathy power while suppress schism is in effect, it must make a successful manifester level check (DC 11 + your manifester level) or fail to manifest the power.
For every 2 additional power points you spend, this power's save DC increase by 1.