I met a bridge troll on the way to Scourge Keep who's gotten tired of eating fish. What he really wants is bloodtusk meat, but he must stay close to the bridge, his home, and protect it against the Scourge. He offered me a key for some treasure -- so he claims -- in exchange for the boar meat. I'll see what I can do.
The best concentration of bloodtusks is in Breakneck Acre, and they respawn quickly. If you aren't high dps you may have trouble getting back to Bol in time from this distant location since the countdown does not stop once you have killed enough boars and looted them. It is reported that you need to kill 20.