 Ra's serum spliced Whisper's genetics with a king cobra's DNA, granting her some of its abilities include secreting venomous poison, enhanced reflexes, and speed of this particular reptile.Though her routine usage with Ra's drugs has slowed her physical aging process thus prolonging her lifespan, Whisper is not an immortal despite her belief.Because of her engagement with Ra's serum, Whisper has developed a drug dependency to its addictive stimulus.