This can drop from any NM on the various floors of Nyzul Isle Assaults, and also from the boss on floor 100. After completing the quest "Unlocking a Myth (Samurai)," the player will gain access to a new mythic weapon skill Tachi: Rana.
Tachi: Rana is-
No element.
Gravitation and/or Induration properties.
Modified by STR 35%.