"Your heads of course." say the six men with one voice. He points his free hand at Chandu with a word a beam of negative energy lances outward. "You've ticked off the wrong devil."
ray v Chandu (arcane accuracy, ranged touch, v flat-footed): 1d20 + 7 + 3 ⇒ (7) + 7 + 3 = 17
Chandu Fort save DC 16. Failure leaves Chandu feeling exhausted, success means she's just fatigued.