1. Talk to Atuba Chief Varkees in the main building of the Orc Village, up the northern ramp. 2. Hunt Rakeclaw Imps (lvl 6 passive) and Rakeclaw Imp Hunters (lvl 7 passive) which drop Black Soulstones - and Rakeclaw Imp Chieftains (lvl 10 aggressive) which drop black and sometimes Red Soulstones. 3. Return to Atuba Chief Varkees at any time and turn in the Black Soulstones for 5a and the Red Soulstones for 50a each. You can continue to do this quest indefinitely and return with any number of stones at any time. Reward: 5 or 50 adena per stone.