When you cast this spell, you must touch the femur used to cast this spell. The femur transforms into a bone blade. The bone blade is a magical longsword that has one charge.

Once on a turn, when a creature that is wielding the bone blade hits another creature with the bone blade, it can expend a charge or a hit dice to add 2d8 necrotic damage to the weapon’s damage roll and the target is diseased for the duration of the spell. A remove curse spell cast on the target can remove this diseased condition.

You, the caster, also gain the following benefits when you attack with the bone blade:

• You are proficiencient with the bone blade.

• When you reduce a creature to 0 hit points, you can use a reaction to restore an expended charge to the bone blade.

At Higher Levels. When you use a spell slot of 4th level or higher to cast this spell, the bone blade is created with one additional charge for each slot levels above 3rd. If the spell is cast with a 9th level spell slot, the necrotic damage added to an attack by expending a charge or hit dice increases to 5d8.