Amulet of Souls

Every creature that is killed by the bearer of this amulet has their soul transferred into the large emerald gemstone set into the centrepiece of the amulet. If the number of souls exceeds 10, once per day the bearer can imbue their next attack with additional power, adding 3d6 necrotic damage to their next attack. Once used, this ability cannot be used again until the next day or when the number of souls contained within the amulet reaches 10 - whichever comes last. The amulet cannot doesn’t work on undead or constructs.