Chiriyuku Senbonzakura (散りゆく千本桜)

1. The next time you hit a creature with a weapon attack before this spell ends, your weapon seeps with necrotic energy, and the attack deals an extra 6d10 necrotic damage to the target. Additionally, if this attack reduces the target to 50 hit points or fewer, it must make a constitution saving throw against your spell save DC or have its hit points reduced to 0, as their soul is torn away in blossoms of black and crimson light. A restrained creature inside your aura has disadvantage on its STR check to free itself and takes psychic damage equal to your charisma bonus.

You may use this feature once per long rest.