These fire rings in the lava (Mount hyjal) drops Volatile fire. 1-2 per catch. On my server those sells for around 13-16g each. And it takes about 5 min too farm all 4 pools. They have a respawn timer for about 15 min. Lets say you get around 15 every time you go there, that is 200g for 5 min! Awesome ju! And also a good thing if you are a hunter is that Terrorpene , this beautiful rare fireturtle spawns right there. (This is a map of where too fish, and the green dots is where Terrorpene is walking around.