i can get cultivation of my enemy after death

I never believed that I would transmigrate into another world; This world is that of immortals, everything is fine but truth to e told I have possessed a body without any spiritual root meaning that I will be mortal and cannot cultivate ; but luckily I have a cheat which can help me to get opponents bloodline, special body, cultivation realm, lifespan but the twist is to get that I will have to be killed by my enemy and its to painful.