Cord of Spirit Stealing

This leather cord is the color of stained blood and feels slightly moist. When wrapped around the handle of a melee weapon, the cord captures some of the energy of any sapient creature the weapon is used to kill. When you reduce a hostile sapient creature to 0 hit points, the cord gains 1 charge (to a maximum of 5). You can use a bonus action to spend 1 charge from the cord to cast false life , or expend more additional charges to increase the spell’s level to the number of charges expended.