Blood Curse

As an action, you cut yourself and smear the blood on a target you can see within range. Roll 2d8 and take that much necrotic damage, reducing your maximum hit points by half of that amount. This reduction lasts until you finish a short rest. The creature you touch must succeed on a Wisdom saving throw or become cursed for the duration of the spell. When you cast this spell, choose the nature of the curse from the following options: Choose one ability score. While cursed, the target has disadvantage on ability checks and saving throws made with that ability score. While cursed, the target has disadvantage on attack rolls made against you. While the target is cursed, your attacks and spells deal an extra 1d8 necrotic damage to the target. A remove curse spell or similar magic ends this effect. The effect also ends if you lose concentration At Higher Levels. If you cast this spell as a 3rd level or higher, the blood cost increases to 3d8 and the duration becomes concentration, 10 minutes. If you use a spell slot of 4th level or higher, the blood cost increases to 4d8 and the duration becomes 8 hours. If you use a spell slot of 6th level or higher, the blood cost increases to 6d8 and the duration becomes 24 hours. Casting this spell with a 4th level or higher spell slot grants a duration that does not require concentration.