Thanks all. I'm still new so I suppose for questions like these I should go to the UESP and Wiki first. I did read over there that a black soul gem and a human heart can be turned into a deadric heart. But the funny thing is that human hearts are almost just as rare. At least with daedric hearts merchants sell them, human hearts only have 11 guaranteed locations and then you're left to chance to find them in certain spots, and no merchants ever sell human hearts.
But, like wachamacallit says, you realistically only need 5 or 6. 4 for armor and maybe 2 for weapons (I like to dual wield war axes).
