Bristol Cove is a fictional, coastal town located in Washington. It was founded 150 years ago by Captain Charles H. Pownall. The town is known for its legend of once being home to Mermaids.
The Egg Sack, roughly the size of a bird's egg, is able to sense the proximity of potential hosts, spewing a cloud of microscopic, insect-like spores called Motes into the air. The motes are able to group together, instinctively invading the host's body through open orifices, ultimately resulting in the gestation of a Bloodburster.
The Egg sack is generally considered to be the first stage in the life cycle of the Neomorph species, and closely resembles the Glostrido tetani and Euniceral pathogenic fungi native to Planet 4.