This is a story achievement which will pop after you finish Chapter 3. You'll start off the chapter with your first skirmish, and it's very straightforward. Most of the chapter will take place in Goldpaw and the Forest of Niall. The only challenge you may find is from the boss at the end of the chapter; as long as you use the higmakers available to you during the battle, you'll be fire-resistant, preventing you from taking much damage during the fight.