Bloodied Anemia

As part of casting this spell, you must expend five Hit Point Die or the spell automatically fails as you expend a huge amount of blood to attempt to invade a creature's own body. The target creature makes a constitution saving throw. On a success the creature takes poison damage equal to half of the hit point die rolled. On a failure you take full damage and the creature has any resistances to poison damage stripped away to become vulnerability. A creature with immunity to poison damage has it's immunity become resistance. This effects lasts for a minute.