ohh ok. so i have to craft 2 more daedra swords then enchant them i got it now. so if i do that then i could put firey soul trap and something else on one weapon right?
Exactly! I have 2 daedrics that I use regularly with Fire & Ice on one and Fire & Shock on the other. I do have soul trap on both a bow and on a 2 handed. In my experience, a one handed really isn't the best thing for a soul trap unless it's a dagger you're using for backstabs or something that deals maximum damage (well over 100) per strike, since the highest soul trap I've been able to get has been 12 seconds. Of course, you just gave me a thought. Since I use 2 daedrics that do 108 each, if I enchanted the two of them with soul trap, since I like to dual wield in many situations, I could easily do enough damage in under 12 seconds.
personally I prefer my bow with soul trap since it makes it easier to get the grand and great souls I need regularly with a minimum of fuss and, as I run cross country, I can do a lot of hunting to collect commons and lessers as well (I use those for recharges). Of course, as I pointed out in a different string, at some point you just have way too many filled soul gems so I always keep a backup set of regular weapons as well. By the way, a bow is a great way to go if you like to fill black soul gems as well. I filled about 10 of them in just under 3 minutes when I wiped out a Legion camp last night. Easy peesy.