true necromancy

You touch the host body and think of whom you want to summon and shove their soul into the host body. you, being the medium force a pact upon them, making them your servant

This spell neutralizes any poisons and cures normal diseases afflicting the target when it died. It doesn't, however, remove magical diseases, curses, and the like; if such effects are affecting the soul of the aforementioned, they afflict the target on its return to life. if the host body is destroyed while the target's soul is inside of it the target's soul is destroyed along with it

for this spell to work you must succeed on a constitution roll of 16 or higher