Speak with Baron Sablemane at the Circle of Blood in the Blade's Edge Mountains.
Here is my plan. We will poison the ogres and then destroy their gronn master.
During my travels in these mountains, I met a man named Baron Sablemane. He is a master of the alchemical arts, and may be convinced to assist us.
You will find him at the Circle of Blood, down in the canyon to the north of here. Whatever price he requires, I will leave it to your discretion to accept.