Haevanata Nuiis the Bionicle Heaven where all good and peace-loving beings go after they die. When a spirit is sent there it could either rome the land in eternal peace and harmony, or become a Guardian Angel for a mortal, being destined to protect their chosen person in dire situations. A Matoran soul can only get his(or her) wings when they do a at least single good deed. The majority of the deceased end up living in Haevanata nui, than going into Havatra Nui, the Bionicle underworld.