No power in the 'verse…
The rather surprised looking vampire stared at the stake in his heart before crumpling to dust.
"Tyen shiao duh" Mal drew his gun, "Do you just see that?"
"If by 'that' you mean 'did I just see my mei-mei stab a man in the chest with a stick, and then see him crumple to dust', then yes." Simon looked down at the pile of dust on the floor and prodded it with the toe of his shoe.
"Good, good: thought I was going fong luh for a minuet." Mal looked at River, "Care to explain what just happened?"
"Cookie dough." River shrugged, "Not cooked yet."