Casting this spell deals an amount of damage to you equal to a bladed weapon of your choice you are holding. When doing so, you can decide to add your Constitution modifier to the damage instead of Strength or Dexterity.   You create a whirlpool of blood around you in a 15 ft. radius. Any creature who is within range when this spell is cast, or who starts their turn within range or enters the whirpool on thier turn, must make a Dexterity saving throw. On a failure, they take 1d8 bludgeoning damage and are pushed 10 ft. towards the center of the whirlpool. Moving within the whirlpool counts as difficult terrain.   Once per turn when a creature moves within the whirpool, they can decide to make a Dexterity saving throw. On a failure, they take 1d4 bludgeoning damage. On a success, they do not take a movement penalty within the whirpool until their next turn.