Blood Blade

You manifest a weapon forged from blood — yours or another's. This crimson blade drips and pulses, thirsting for violence. The blade counts as a melee weapon with which you are proficient. It deals 2d8 slashing damage, and on a hit, it causes blood to splash, dealing 1d4 necrotic damage to an adjacent creature of your choice within 5 feet (if one exists). This necrotic damage does not increase.

If you are below half your hit point maximum, the blade deals an extra 1d8 damage on hit (choose slashing or necrotic when cast).

The blade is considered magical. It sheds dim red light in a 10-foot radius. If you drop or throw the blade, it dissipates at the end of the turn. You can summon it again as a bonus action.