a move or combo will call your friend spirit for you from spirit world.
For DarkSpirits: a phantom that doesn't attack its owner will be born. this spirit will attack the last mob or player you hit or who hits you. this spirit will have little health but high attack damage. this soul will emit an evil spiritual energy where it dies, and it will give bad effects to nearby creatures but these effects will not affect the owner.
For LightSpirits: a vex that doesn't attack its owner will be born. this soul's health will be very high but attack power will be low. this spirit will attack the last mob or player you hit or who hits you. this spirit after a while, or when he is about to die, he will use all his remaining power for heal the owner or give a few effects and die.