You target a creature, other than an undead or construct. Blood, or some other life essence bursts from the creature, dealing damage and inhibiting its actions. The target must make a Constitution saving throw or take damage dependent on its remaining hitpoints. The target takes 1d6 force damage if at full hitpoints or 1d10 force damage if it has less than half of its hitpoints (bloodied). In addition, the creature's next attack roll suffers -1.