A feast

A spirit, a demon from Finnish and Karelian mythology. Probably a later loan word associated with the word "spirit".

Piru is mentioned by Agricola as a possessed deity, on the other hand, there is no certainty that he was a deity. Piru is known in folk poetry as a bad, usually very small creature, a kind of demon, and a demon was mentioned by his name in the Christian religion. The word "feast" must be a diminutive form of Perkele, or it is borrowed from the name of the Slavic god of thunderstorm Perun. In both cases, the etymology points to the god of thunderstorms.

In folklore, Piru is often depicted as an evil spirit of the forest, with whom smart Alec either wins or loses the battle of wits, giving or receiving a fine in return.

In many cases, this is what the phenomena of poltergeist and persecution are called. The devil may be called Payapiru or the Main Feast.