Bâo-Lèi Sword

The Bâo-Lèi Sword (宝雷剣 Hōraiken; Chinese pinyin: Bâolèijiàn) is a silver sword and the most treasured heirloom of the Tao Family.

About
The Bâo-Lèi Sword is an ornamented sword with a collapsible blade and a pair of purple tassels at the end of the hilt.

It possesses spirit-refining abilities and was able to evolve Bason from a Human Ghost to a Seirei Class spirit by merely being used as a medium for the Over Soul.

It was first seen used by Tao Yúan as the medium for his Dà Dào Lóng Over Soul and was later passed on to his son Tao Ren. After Asakura Hao had the Spirit of Fire incinerate the Basontou, Ren used the Bâo-Lèi Sword as the main medium for his Over Soul.