OK First to do this you will need the spells Soultrap and a Summoning Spell. Once you have those two spells go to somewhere where you can make spells {For ex; A Mages Guild} and choose the summoning spell. Set it for 2 seconds on Self.
Next choose soultrap on target, do NOT change any of the options except change it to target. Once you buy the spell look directly at the ground, if you do not cast it directly at the ground the creature will disapear in 2 seconds. Sometimes even if you are looking at the ground the creature will disapear. This is a fluke. When that happens do what I do and go to a more open area. Bye Now!