Dire Stun
(Complete Psionic, page 49, DnD 3.5)
[Psionic]
When you choose to stun your foe with your lurk augment ability, your foe might be stunned for a long time.
Prerequisite
Lurk augment class feature (page 14), Extra Lurk Augment*
Benefit
When you use a lurk augment to deal a stunning strike, the save DC against the stun is increased by 2, and the stun duration is increased by 1 round.