Ok. Here is what you need,
Access to the arcane university, a greater soul gem with greater soul in it, any wepon of your choice, a drain health spell ( you should be able to get a cheap one at Discount spells in the Imperial Market District) and about 5000 gold (I'm pretty sure it was like 3700 gold, but better to have more than less). After you have all that go to the University then to the weapon enchanting place the place you weapon on the alter, then add the gem. Next you add the drain health spell and set it to do drain 100 health for 1 sec. Name it, and BOOM you've got the ultimite sword! It will kill anything in one hit! I'm not sure if you have to do this again when you get to higher levels I found out about this when i was already lv 24. So good luck! =)