Bolt of Vile Blood

You draw blood from your hand and taint it before sending it at your target in a bolt of hate. You must spend a number of hit points to cast this spell (cannot be less than 1). It deals 1d12 fire damage plus the number of hit points spent to cast this spell, the target must then make a constitution saving throw or take an additional 1d12 poison damage, targets who pass the saving throw do not take the additional damage

 At Higher Levels: This spell's damage increases by 1d12 at 5th level (2d12) 11th level (3d12) and 17th level (4d12) additionally when casting this spell at a higher spell slot higher than 2 the number of bolts increases by 1.