Shade
Monster Junkie
Blood Drain (Ex): Addaazahr drain blood, dealing 1 point of Constitution damage to any living creature that begins its turn with an addazahr swarm in its space. Once a swarm has dealt 4 points of Constitution damage, it is sated and flies off to digest the meal. If its victim dies before the addazahr swarm's appetites have been sated, the swarm seeks a new target.
I think I'm OK with this. freyar?