You smear a slashing melee weapon in your hands with a basilisk's blood, temporarily granting it a measure of sentience in the form of intense bloodlust. When you make an attack, every creature within 5 feet of you, must succed in a Dexterity saving throw, or take magical slashing damage, according to the weapon's damage die, as it whirls around in a murderous arc. If all targeted creatures succeed in the saving throw, you have disadvantage on all attack rolls until the start of your next turn, as you recoil from the jerking motion.