The Will and the Way[]
Power manipulation is the skill of amplifying a psionic power or devotion. This proficiency can only be used to manipulate powers in the psionicist's primary discipline. When the psionicist initiates or maintains a psionic power, he may use power manipulation to boost its effects. First he initiates the power with a normal power check. Then he may attempt power manipulation by making a proficiency check. The attempt incurs an additional cost of 5 PSPs, whether he succeeds or fails. If the character makes a successful proficiency check, he achieves the result listed for that devotion's power score.
If the psionicist rolls a natural 20 on the proficiency check, he botches the manipulation attempt and suffers the ill effects of rolling a 20 for that devotion's power check.