Orc Bone

Orc bones are twisted and altogether unpleasant to look at, as is fitting when you consider whence you got them. If you need a reward for killing those vile creatures, then other than the small matter of having kept your lands safe, these are the only reward you're likely to get! If you kill enough of them, you may get a poisoned dagger or some other weapon, but you'll likely have to kill a lot of them before you can boast that prize. These bones can be made into bonemeal just like any other, and so they can be used to make crops grow. Of course, you could simply hang them on your wall to show guests just how many of Sauron's servants you've killed.