You gain a +2 to attack and damage rolls with this weapon. Damage creatures take from this weapon cannot be healed until the end of your next turn.
Curse. When you attune to “Makoto” you are compelled to never have the sword leave your side. You cannot unattune from this weapon until the curse is broken, which can be done in the usual ways. While cursed, whenever you deal damage with this weapon, you are hurt for 1d4 psychic damage.
Proficiency with a Longsword allows you to add your proficiency bonus to the attack roll for any attack you make with it.
This weapon has the following mastery property. To use this property, you must have a feature that lets you use it.
Sap. If you hit a creature with this weapon, that creature has Disadvantage on its next attack roll before the start of your next turn.
Notes: To be used in the Demon's Souls campaign I'm making, soul bound to the Nexus, Versatile, Sap