Plague Demonspawns—Shattered Pillars by Elizabeth BearRead about the other entries on the list.
There’s something I find really creepy about body horror: incubating something that will destroy you within your own body. Bear’s plague demons fit the bill, and more: they grow within a person’s lungs, slowly choking them to death; and then tear themselves messily free at the death of the host. Eeep.
--Marshal Zeringue