My power is being restored gradually. I'll soon seal those demons.
However, because I am not yet at full strength, I cannot seal off the biggest source of evil hidden in this ruin.
Sprite Messenger %n%, you need to find the Black Flame Stone. It's the key to the entrance of the Black Flame Barrier.
Brothers Walgo and Moghama loiter inside the Black Flame Barrier. You will need the Black Flame Stone, the key to the Black Flame Barrier, to enter the Barrier. Annihilate the brothers, and by the time you're done, my power should be fully restored.
It took all of my strength to defeat those two a thousand years ago. They're like roaches; every time you think they're dead, they just come back. Be careful.