Ok I only have three Ideas

1. Its blessed to if touched by a evil heart with a pure heart underneith the weapon can crack the evil and release the heart. The Jackal will faint as it uses up himself a bit to do that as well. If slammed onto the ground point down first the spear will proteduce a shiled like circle that will expell evil (much like the patonus in harry potter) and evil will be forced to leave. Jackal shall faint for a day

2. Its blessed to command elements, able to use only one element at the time , t will use whichever element is closer if its the pool in the jade palace it will use water if its neara  fire it will use fire (yeah you get th point)

3. Blessing of Anubis (I can't help it sorry guys)  Summon up three warriors from the dead to help aide ina  fight, but afterward the spirits leave, the spirits do not speak they know who is evil and who is friend. Never summon the same spirits twice