Perkele

Perkele is a Finnish malevolent forest spirit. It is a close accomplice of Satan, but prefers to prank, annoy and mentally torment people rather than kill them.

Physiology
Perkele rarely makes itself seen, but most reliable accounts tell that it looks much like a large branch infected by witch's broom-mushroom. It is capable of flight, and it can mimic the sounds of various European forest animals, as well as the speech of humans.

Its appearance is sometimes stated to resemble hypothetical corrupted Angels.

Powers
Perkele has a tiny amount of telekinetic powers accompanied by a wide range of green elemental magics. It can summon almost any type of weather, commune with animals and plants, as well as create temporary Sudenkuoppas to have people get lost in forests.

Behaviour
With the little amount of magical powers that it possesses, Perkele has a tendency to try and cause as much mischief and grief as possible. It will often times stalk a single person for weeks on end, trying to foil anything that they do. In worst cases, this has driven people to suicide.

The Perkele is unable to leave the forest. Thus, its habitat is limited to Scandinavia, as the border between Finland and Russia is kept permanently deforested.

Things said about Perkele:

 * "PERKELE!" - a sound often heard echoing through the ancient woods of rural Finland.

Trivia

 * Perkele has dubbed a swear word in the Finnish language: "perkele", roughly translating to "the devil".