The sound comes from Warcraft III: Reign of Chaos, released by Blizzard in 2002, where the Dreadlord is a playable Undead hero. The Nathrezim demon is best known for abilities including Sleep, which puts an enemy unit out of action for a short time. His bored, restless unit responses became favourites among players who clicked heroes repeatedly just to hear them. As Warcraft clips spread through forums, YouTube edits and soundboards, this short sleep line survived as a standalone reaction for tired or idle moments in gaming culture.