Blood Weapon

As part of the action used to cast this spell, you must make a melee attack with a weapon against one creature within the spell’s range, otherwise the spell fails. Before you make the attack, you slice open your hand using the weapon, taking 1d4 damage, this damage cannot be reduced or prevented in any way. On a hit, the target suffers the attack’s normal effects, and the blood left on the weapon flares like spores from the weapon into a noxious red aura that forms around the target, dealing them 1d12 damage of the weapon's type + the damage you took from this spell.

This spell’s damage increases when you reach higher levels. At 5th level, the melee attack deals an extra 1d12 damage to the target (2d12), and an extra 1d4 damage to you (2d4), and increases by an additional 1d12 and 1d4 at 11th level (3d12)/(3d4) and 17th level (4d12)/(4d4).