Black Grand Soul Gems, Necromancer's Moon Quest Options

[Ulrich453]

For thos of u Guys who have done the Mage's guild mission Necromancer's Moon.

since you know what im talking about, In dark fissure theres a alter. how do you

get the alter to Make your Grand soul gem into a Black Grand Soul Gem? I read

the hand written note that says put your Grand soul gem into the alter, Then pray

at it, ?? how do u pray, then finally it says use soul trap on the alter and you will

receive a black grand soul gem. Can you use a Soul trap Touch spell? or can u use the Umbra?

o and does the grand soul gem have to be empty?