User blog comment:B214/Volume 17 spoilers./@comment-162.208.221.47-20140322215150/@comment-174.119.241.202-20140323213152

it's main ability is probably to produce purple flames, speculated from it's other name Chief Mourner's Crusified Stand of Purple Flames​, and confermed by it's wielders title Walburga of the Purple Flames (Shien no Walburga).