Blood Binding

Once per day, when you drop to 0 hit points but are not killed outright, you can choose to use the Blood Binding to stabilize yourself. Upon doing so, the amulet drains hit points equal to 5 + your Constitution modifier from a creature within 30 feet of you (must be a living creature) to restore half of that total to you. This can be a creature you choose or one nearest to you. The target must make a Constitution saving throw (DC 15) to resist this effect. On a failed save, it takes necrotic damage equal to the amount of hit points restored to you. This feature recharges after a long rest.