The primary weapon of a soul Reaper, the Zanpakuto, is a one-handed martial finesse weapon. Although the specific appearance is dependant on the wielder as it is an imprint of their spiritual pressure, they primarily take the form of a katana, wakazashi, nodachi, or tanto. Though initially formless, the spirit inside the sword is molded by the user’s soul, eventually becoming its own being. If your Zanpakuto is destroyed, it can be reformed during a long rest.

Shikai

Through intense training and work on your skill with the blade, you have finally learned the name of your Zanpakuto. As a action you call your Zanpakuto's name, invoking it's power. All Shikai have their own unique special ability, work along side your DM to decide this ability based on your character's personality.(You gain the ability to use Flame strike/Gate)

 

Bankai

Your weapon and you are one in the same. Your thoughts and emotions, your very wills are intertwined allowing you to draw forth the maximum power your weapon is capable of. You now gain critical hits with rolls of 19 or 20. While in Shikai form, another short phrase is uttered to unleash the power within and work with your DM to find your weapons special ability that is added as an effect, such as a bonus to certain types of Bakudo or Hado, a boost to speed, or some special attack. You must spend a bonus action end of each of your turns to maintain this form. (You gain the ability to use Gate/Sunbeam)

Proficiency with a Longsword allows you to add your proficiency bonus to the attack roll for any attack you make with it.

Notes: Exhaustion, To bond with your spirit energy, Combat, Versatile, Sap