A psion can sublty piggy-back on someone else's mind and hijack their senses. The psion attacks the person and the person makes a mental save against the total amount of PSI-points spent on the ability. If the person fails the save, the psion gains control of their senses.
The person is not aware that the psion's mind is present. The psion chooses what senses they want to borrow, and the effect is that the psion feels exactly what the target is feeling. If the psion has borrowed sight and hearing, the psion will hear and see what the target sees.
The psion keeps their own senses, but they are subdued in the background and it takes some practice to determine which sense is triggered. For the duration, the psion is at -3 on
Perception checks regarding their own senses.