"Light first bonfire with fire damage" is an objective in the side quest Lost Souls in Tiny Tina's Assault on Dragon Keep DLC
Walkthrough[edit]
Head to the East then North from the Crestfallen Player. This will lead you to the first of 3 Bonfires that you need to light. Approach and fire on it with a Fire-Type weapon to ignite it and trigger the conflict. You will encounter Conjurors and likely encounter Knights and Archers as well.
