The Orcs in our realm inhabit the mountain range of the Broken Spears mountains, those mountains surround Lake Mennaen.  They are a peaceful race, long ago trading in the call for war and settled into a life of peaceful trade and farming. They have proven to be great farmers and, attuned to the deep ways of earth magic.  Their culture is one of the earth and the cycle of life. I have visited them often over the years learning much from them, as I believe they have learned from myself and the philosophy of magic.
 
I have spent many a night sharing a pipe and talking till morning, trading stories of legends and tales of old. I have formed quite a few friendships, and with that, have been able to acquire a supply of their blood, in exchange for knowledge that they seek. Thus, providing ample opportunity for my apprentices to collect it and bring them to you. Corked and sealed in a vial, to preserve its potency. Sufficient for all magical potions, magical studies, and spell components.