Parasitic Feeding

The mutant can survive only on blood from other living creatures.
Type: Major negative.
Effect: The mutant’s mouth shows the signs of this mutation clearly: it is an atrophied, sucker-like organ surrounded by small, razor-sharp teeth. If the mutant pins any creature with both blood and exposed skin (thus, excluding, for example synthetics), she may begin feeding. She may continue to feed each round her opponent remains pinned. This inflicts 1 point of Constitution damage per round; she must inflict 4 points of Constitution damage (though not necessarily all to the same creature) per day in order to survive. While feeding, she is considered to be flat-footed with respect to those outside the grapple, even if she has feats or abilities which allow her to keep her Dexterity bonus while grappling. If the parasite is forced to make a massive damage save while attached to a victim, she detaches and loses the pin, even if she makes the save.
If the parasite cannot find prey, she begins to die. She takes 1 point of Constitution damage herself every day that she does not find enough to eat. This damage does not heal normally. Each point of Constitution damage that she inflicts on another creature first goes towards replenishing her own Constitution score; after the parasite has recovered fully, the damage she inflicts again counts as normal feeding.
Note: The parasite does not require food or water. She takes all the nourishment she needs from others. The parasite can only feed on living beings; even a recently killed animal is of no use to her. The character can attempt to carry her prey, subject to normal rules for carrying capacity.
Biotech: Implant.