Oblivion Black Soul Gems

Drakir, you wanted to know the proper ingame way to make black soul gems - First, head to one of these locations: Dark Fissure (east from the shrine of Vaermina) Fort Istirus (east of Kvatch) Fort Linchal (north east of Kvatch) Wendelbeck (at the headwaters of the Panther River) Outside them you will find an altar. For one full day per week, a purple light shines down from the sky on the altar. If you get there and it isn't there, just use the wait command and wait 24 hours until it is. Once the light is shining on the altar, place a SINGLE, EMPTY, GRAND soul gem in the altar (it's a container like a chest), then cast a soul trap spell on the altar. Then open it up again, your grand soul gem is now a black one. Repeat for as many spare empty grand soul gems as you have, only one at a time though, but you can do them one after another. And in case anyone doesn't know why you would WANT them - black soul gems can trap the souls of the higher races - men, elves, khajit, etc... which are always grand souls. Bandits are ideal. If you want to capture grand souls using regular soul gems, only VERY high level enemies such Xivilai, Lich (NOT Nether Lich), Minotaur Lord (not regular Minotaur) have grand souls.