Purity Alignment by Lupine Horror
"If you're going to be traipsing around the Astral plane, master, you should at least know how to defend yourself. Your magic is useless there, remember?" The shade said, after hearing Harry's latest request.
"What would you suggest?" Harry asked.
"At the very least, a wraith-blade and a basic shadow bolt spell." It suggested.
"Wouldn't want you dying, or having your soul devoured, would we?"
"And how do I cast them?" Harry asked.
"The Necromancy books I managed to get a hold of were more on raising spirits and the dead, as well as philosophy."
"Not surprising, I haven't heard of a proper necromancy appearing in centuries now." The shade responded.
"Now, for the wraith-blade, you are using your own soul as a weapon. You want to guide it down to your hand, and then force it out, forming it into whatever shape you deem appropriate. Remember to use your Tiet, not your mana, this is necromancy, not magic."
"Okay." Harry agreed, forcing his very life force, his 'Tiet' as the Egyptians had termed it, out through the palm of his right hand, imagining it turning into a weapon.
He flinched slightly when he found a pale blue light erupt from his palm, only to form itself into a a large greatsword with a broad blade, though the shape of it was strange, being wavy like a kris dagger.
"Interesting, it's blue." The Shade commented, elaborating when it saw Harry's confused look.
"The colour is supposed to tell you how 'pure' a person you are, white for the saintly, and black for the vile."
"So I'm . . . a good person?" Harry hesitantly asked.
The shade chuckled.
"'Purity' and being 'good' are not necessarily the same thing." It said.
(P.S. foreshadowing happens here - roughstar333)