Horrified

Horrified is a debuff inflicted for the duration of a fight with the Wall of Flesh. It prevents players from moving too far away from the Wall. Running too far from the Wall, or getting caught behind the Wall, causes The Tongue debuff. The debuff is removed when the Wall of Flesh dies or when the player dies.

Teleporting away with the Magic Mirror while afflicted with Horrified causes instantaneous death upon arrival at your spawn point. The Wall of Flesh, however, will still be active until it has swept across the entire Underworld. Exiting results in death upon re-entering the world, although the Wall of Flesh will have de-spawned.