Blood Bending

A long outlawed and incredibly rare form of bending that turns someone's own blood against them. To activate this ability you must be bending water and it must be a full moon. You may substitute any water bending attacks with a Blood Bending attack, your target must have blood or a blood like substitute. Target creature within 30 ft must make a constitution saving throw, equal to your monk dc, or take 3d10 necrotic damage, half damage on a save. Every round you choose to Blood Bend you must make a dc 18 Wisdom save or take 4d10 necrotic damage.