SCP-XXXX "Aitvaras"
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SCP-XXXX-01 taking its first flight after being released from its containment chamber.

Item #: SCP-XXXX

Object Class: Safe

Special Containment Procedures: Up to 10 instances of SCP-XXXX can be kept in a single 5x5 meter wooden or stone room, that must have at least one small window. The floor of the room must be covered with fresh hay every day (during cleaning procedure all SCP-XXXX creatures must be temporarily moved to another room). Specimens of SCP-XXXX must have access to fresh water at all times and fed two times per day, specifically: oats or wheat, forest berries native to the Northern Europe (bilberries, blackberries, wild strawberries), cow or goat milk, and fresh cattle meat. To prevent physical weakness and illnesses, creatures must be released to an open-air cage at least once a week. Any found eggs must not be taken away from parents. Once hatchlings appear, they must be taken to the incubator and taken care of until they are one week old, at which point they can be placed in a room for adults.

Description: SCP-XXXX is a species of shapeshifting mythical creatures native to Lithuania, the Northern Europe. While indoors, the creature takes form of a white or black rooster, that is slightly bigger that a normal bird and has a fiery tail, but whenever placed outside, it will suddenly change its appearance into a dragon-like creature that usually looks like a serpent, specifically: grass snake (Natrix natrix). The size of SCP-XXXX in its original serpent form may drastically vary from 1 meter to over 10 kilometers in length and bigger. The serpent is also capable of flying and will most often stay as high in the sky as possible (10,000-15,000 meters above the sea level) and will land only if necessary. SCP-XXXX seems to be highly elusive and sneaky and will most often avoid being spot by humans, usually by disguising itself as harmless animal (grass snake or rooster). It has been noticed, that SCP-XXXX prefers to stay indoors at all times if possible. Usually, it will lodge itself in a house or any other indoor area and will most often refuse to leave.
The origin of SCP-XXXX is unknown, though it is one of the most popular mythological beings in Lithuanian mythology and has been worshipped as demigod for ages. Lithuanian legends say, that SCP-XXXX or Aitvaras may hatch from an egg of a 9–15 year old rooster, though this theory is yet to be proven (the Foundation has not yet registered SCP-XXXX's reproduction process, so it is unknown how exactly fertilized eggs appear). It has also been noticed, that after termination SCP-XXXX will become a small spark, that exists for a random period of time before vanishing (no physical remains will be found aftermath). Lifespan of SCP-XXXX is currently unknown, since none of SCP-XXXX specimens died of natural causes yet.
Behavior of SCP-XXXX is always similar to that of which animal it represents at that certain moment: indoors it will behave like a normal domestic rooster, while outside it behaves like a grass snake. However, it has been noticed that SCP-XXXX is intelligent and can understand human speech, which makes communication with the creature quite possible (refer to ‘SCP-XXXX test 011: Learning’). Unfortunately, SCP-XXXX will most likely ignore any commands or questions given to it, if it is not interested in a particular person that it wishes to communicate with. Overall behavior of SCP-XXXX is non-aggressive to humans and friendly to other animals, although it will defend itself when attacked.
SCP-XXXX also possesses some level of supernatural powers, similar to those described in Lithuanian myths and legends. It is said, that this creature brings both good and bad luck to the inhabitants of the house. Aitvaras provide their adopted home with stolen gold and grain, often getting the household into trouble. According to many, an Aitvaras can be purchased from the devil - the price being that person's soul. Others say, such creature can be lured to the house with food that Aitvaras loves the most – milk and meat. Various tests had been conducted to see whether SCP-XXXX is capable of bringing good and bad luck to certain people: each participant treated his or her chosen specimen with care or violence. Results show that regardless of how SCP-XXXX is treated, the participant will experience both good and bad luck with different consequences, some of which were life threatening. The effects can be easily terminated by removing SCP-XXXX from the house of a person, whose luck it was influencing. Effect from removing SCP-XXXX from the house also vary: some participants had vivid dreams about devil visiting them at night and offering a bargain, to cases of extreme bad luck that were considered as SCP-XXXX’s vengeance for taking it away from its new home (for more details refer to ‘SCP-XXXX test 008: Luck’).

Discovery: The first specimen of SCP-XXXX, known as SCP-XXXX-01, has been discovered in the south of Lithuania, in the Čepkeliai Marsh national reservation, in year 19██, when one of the trespassing agents entered an abandoned house in search of shelter from a thunder-storm and stumbled upon a rooster with fiery tail residing inside. The Foundation’s local administrator has been contacted immediately and the creature was safely transported to the nearest containment area in ██████.