got few way

1. ask from god ...u can ting ting success is lower but free
2. ask from hell god(like dua pek ya) higher chance to success , but u need to do certain stuff ..requested by him ..else u will badluck and lose even more 

3. ask from hantu ..high chance to success, need to fullfill their request *including take your soul as scapegoat OR marry with her < if ghost is girl

son of demon lo .. u can be king later .. but don be so happy , that son gonna be evil . I thought we got a lot of chinese folklore talking about a love of a human being and demon ?