At your urging, your allies work harder and better. There might be some drawbacks, but none you need to suffer.

Encounter   ✦     Psionic, Psychic
Immediate Interrupt      Close burst 10

Trigger: An ally in the burst makes a skill check or a saving throw and dislikes the result.

Target: The triggering ally

Effect: The target rerolls the check or the saving throw. If this second check or saving throw is not successful, the target takes psychic damage equal to half your healing surge value, and this power is not expended.

Published in Dark Sun Campaign Setting, page(s) 55.