|Last appearance||"Ignition Point"|
The Lantern appears in the episode "Incendium." It was used as a containment device to protect Flame Princess from burning through the Earth. According to Princess Bubblegum, she had Flame King lock Flame Princess in the lantern in order to prevent her from melting through planet and burning it if she were to experience extreme romance due to her elemental matrix instability.
It is a giant lantern capable of holding Fire Elementals. The glass is a dark yellow with the base of the lantern being yellow with orange triangles. The base of the lantern has two knobs that are connected to ropes that suspend the lantern.