Notes from author
Idea stolen from "Let," ScarletWolves01. http://www.nicovideo.jp/watch/sm28386564
Good damaging finisher weapon, with Crystal Rapier for more BS damage.
It also has the option to swap to Great Club when possible.
Sanctus is to negate power within damage, but it's negligible and could be replaced with Grass Crest/Crest/Dragoncrest etc.
Alternatively the stats for this build work for a Kumo Havelmom with thorns and DST.