Now that we know only the Jotun can process Lym Ore, I understand why Ereshkigal's forces have enslaved the Jotun there. I suspect that they are being forced to create something of great power. Knowing what that is will likely give us some insight to Ereshkigal's plans, which means we need to uncover as much information as possible.
Ridding the forge of all Balaur and freeing Primeth and the rest of the Jotun should let us investigate further. If the blacksmith will part with the blueprint for whatever it is they've been creating, we might be able to gain an advantage in this war.
Good luck, Daeva! I'm counting on you to bring this information back to me.
You... have saved us. We... owe you a great debt. Balaur... they threatened all of our lives.
I... could not let them harm my people. So... I kept the fires of my forge going for them. I... am pleased that I will no longer have to do so.
Tell me... how I can repay you for the boon you have granted me?
You... want my blueprint? It... will do you little good. Only... Jotun can craft this design.
Still... I do not think you can cause harm with it. I... will give it to you.
You've returned!
Do you have my--I mean, were you able to find the blueprint I wanted?
Good! Very good!
Despite what he said, this design might be very useful to me--us--in the future. Just wait, [%username].
Defeat Brigade General Frigida and speak with [%dic:STR_DIC_N_IDF7_Weapon_Promethun_E].
View Primeth's blueprint in the Quest Cube.
Speak with [%dic:STR_DIC_N_IDF7_Weapon_Vritra_D_02_E]
Defeat Brigade General Frigida, free Primeth, and retrieve the blueprint.
Rith asked you to track down a blueprint being used by the enslaved Jotun to create something for Ereshkigal. He tasked you with defeating all Balaur at the forge, freeing the Jotun, and bringing back the blueprint.
After defeating Frigida, you were able to rescue Primeth, who then gave you the blueprint Rith wanted.
Rith was greatly pleased with your results, noting that the blueprint would be very helpful in his research.