Sang Que initially thought the mask of the Evil Suppression Bureau was the External Heart Lamp, which would increase the number of her Heart Lamps directly once obtained.
But that's not entirely true; the mask, token, and official seal make up a set.
The official seal can harness the power of incense to attack evil spirits and ghosts. Back in the woods, when the Li Family Widow was possessed by an Earth Ghost, He Buning used his official seal to expel it from her body.
The official seal of the Evil Suppression Bureau can be used repeatedly, but the one from the Ghost Opera Troupe breaks after a single use.
The official seal is carved from an entire piece of Ten Victory Stone, featuring a ghostly face similar to the mask on top, and the words 'Evil Suppression' and 'Night Travel' below.
The power of the official seal depends on how much incense one possesses.
