 SCP-772 is a wasp of unknown species, superficially resembling members of the Megarisa genus. A mature adult is typically 60 cm in length, from head to abdomen, excluding antennae and ovipositor. This barbed ovipositor, reaching a length of up to 70 cm, is used to penetrate its host and deposit anywhere from 5 to 20 eggs. Eggs are typically 6 cm long and 2.5 cm in diameter. SCP-772 is meticulous and almost surgical during oviposition. It makes an incision no longer than 3 cm, and the host is paralyzed and orcomatose for several hours until the wound can heal sufficiently. Injected along with the eggs is a polydina virus, uniquely adapted to suppress the immune system of mammals, analogous to the smaller perisotoid wasps which do the same to their caterpillar hosts.