This massive, five foot long sword has a tempered, slightly curved blade with a single edge. The blade itself is black with streaks of dark red that seem to slowly swirl and pool within the blade as it is held or wielded in battle. Rhalto the Red, its legendary owner, was said to have carved through legions of foes while sustained by his blade.
When you attack a creature with this magic weapon and roll a 20 on the attack roll, that target takes an extra 10 necrotic damage if it isn't a construct or an undead. You also gain 10 temporary hit points.