A Mysterious Test
The other path is blocked by lava. A massive flow shoots from the crack closest to you onto the other side. Watching carefully (Perception DC15), you see that there is a small gap between the lava flow, when it resets, but it moves too quickly for anyone to fit through. Must come back later after discovering time control, or you can use an ice orb to freeze a chunk of lava and seal the vent. If feeling extremely adventurous, a medium or small character (no orcs) can make a dexterity check (DC25) to jump into the gap and make it across. Across the gap you’ll find the wing key. Whoever picks it up will feel a pulling towards it, and will feel true possession of the key. Throwing this up into the air will spawn wings that allow you to fly momentarily. It will also fly back to you if you lose it. Use it to fly over the lava.