Spirit derives from Japanese mythology.
Kamaitachi, or Sickle Weasel, is a supernatural being, created to explain the natural phenomenon of cutting winds.
They are carried by the winds in the mountains, when they pass their nails leave deep cuts in their victims that don't bleed nor cause pain.
It is thought that their name came from the word kamae-tachi, which means "sword stance".
Assassins aggressively fights alongside its summoner.
Summoning ingredients requires: Whetstone