This sound comes from Hearthstone and is spoken by Lord Jaraxxus, a Warcraft demon character featured as a legendary warlock card. The entrance quote became memorable among players because of its huge vocal delivery and instant shift in tone when the card appeared. Over time, the line spread beyond the game into meme edits, livestream jokes and dramatic character introductions. It is still used because the opening phrase alone is enough to signal an exaggerated, boss-level entrance to many gaming audiences.