Proceed with Asara's story, summon a demon, use the scroll in your inventory.
I don't have skill summon demon, how to learn it?
What was your choice during the summoning? Did u offer help with both? Summon only 1?
No, i choose the last option
Yeah, helping her and not needing any for yourself? I believe that has a hint issue. Simply ignore the demonic scroll bit. You obviously didn't get it as you don't have a demon.
Proceed with the other one and go to the pool.