Balnazzar: My kind are called Nathrezim. Dreadlords, in your tongue. Perhaps Thal'kituun would be more fitting. It means Unseen Guest in our language.
Dathrohan: Who--? You...are Legion.
Balnazzar: Fitting because I have existed here, between the world of the living and the dead, awaiting a moment such as this, under the very noses of the Scourge, without their slightest suspicion.