Torchlight 2 Walkthrough Part 12: The Djinni's First Task
The first of the Djinni's tasks is a sort of hunting mission, a seek and destroy mission of sorts. Your minimap will lead you to where you need to be, which is in this case the lair of Aruk. Your target, Aruk the Cruel, will be found in a small cave with a group of champion minions around. There are several ways to take on Aruk.
The first way is to brute force your way past his cavalcade of guards and tackle the boss before the guards can respond. Alternately, you can pick off the champion minions before focusing on Aruk. We would recommend that you take out the champions first, but certain classes and playstyles will be better suited to removing Auruk from the scene first. Classes who are focused on dealing the highest DPS, for example, can bolt straight for him and take him out. As you fight, watch out for sandstorm attacks, which will push you back from your target and deal damage over time.
As you fight, you will have to watch out for bone traps just like you encountered in the larger desert. Auruk can catch you in one of these and deal massive damage to you before you escape. Use potions to keep your health up and click furiously on your character if you find yourself caught inside of one of these devious bone traps. Avoid the small bone rings on the floor if you can and you should be able to steer clear of being trapped.
Once Auruk dies, loot his lair and free the prisoners inside before returning to the Djinni for your second quest.