Spawns at surface only at night if full moon rised.
It should be faster and stronger than ordinary mob, and has 30 - 40 heath points, and some armor.
Hostile to players and villagers.
If it kills a player or a villager it should be converted to werewolf(and have name of the killed creature). Thos creatures can't be converted back to villagers.
Applies "Moon Bite" effect on its targets when attack it. This effect lasts till next full moon and do nothing almost all the time except next full moon night - it'll kill you immediately and spawn werewolf at place of your death.

TODO:

• Werewolf mob
• "Moon Bite" potion effect