This mission is another of the super simple transition missions, taking place between two acts of the game. Having just defeated the Siege Guardian, you are well on your way to seeing everything that Torchlight 2 has to offer (in terms of story content, anyway - see our beginner's guide for details on all of the classes, pets, items and more that you can get you hands on in order to change up the experience on subsequent playthroughs, and stay tuned for guides to the game's side quests.)

Anyways, now that you're done with the desert and the Siege Guardian, head back towards Zeryphesh. Here, you will have to speak with the Air Guardian to complete and turn in your mission. Accept your experience and gold, and then head over to the rail station just a few feet off to the side. Just like you did before, you will now have to take the rail road to the next area of the game. Speak with the man with the "?" symbol over his head to initiate the next phase of the quest. When you are ready, board the train and head off towards the Imperial Camp.

Before you head out, you will want to make sure that you have done everything that you want to in the Zeryphesh area.  Just like with the last area, you are free to return here via rail if you really want to, but it's always more convenient to complete all quests and treasure hunts now, before you head on to the next area. That way, you won't have to go through the whole rail road process.

When you are officially ready to proceed to the Imperial Camp, see our next guide for the continuation of Torchlight 2's story.