Blood of the Damned

 You cut your hand and wipe your blood on a weapon or creature. If a creature comes in contact with your blood (either through a weapon or through touch), the creature must succeed on a Constitution saving throw or take 1d12 acid and poison damage and become poisoned. If creature succeeds saving throw, they take half damage and does not become poisoned.

This spell's damage increases by 1d12 when you reach 5th level (2d12), 11th level (3d12), and 17th level (4d12).