Razac

> They glared at the villagers from under their inky cowls. Suddenly Roran felt himself become lethargic and powerless to move; it was hard to even think. Fatigue seemed to chain his arms and legs in place.

Eldest, Retaliation, page 144

Their greatest weapon is their evil breath, which fogs the minds of humans—incapacitating many—though it is less potent on dwarves, and elves are immune altogether.”

Eragon shivered as he remembered his first sight of the Ra’zac in Carvahall and how he had been unable to flee once they noticed him. “It felt like a dream where I wanted to run but I couldn’t move, no matter how hard I tried.”

The Nature of evil, pg 572, Eldest