You find yourself welcome in the Greathammer stronghold and spend your time training and preparing for a return to the war against the Ironfang. Before you have time to chaff at the delay, Karburtin Lightbrand summons you to his home.
"Kind friends," Lightbrand says, rubbing the curls of his short beard with concern. "You have done us such a great service in past weeks that I wish I could bring you better tidings. Prince Gorm has dispatched not insignificant material aid—weapons and armor—to your allies, but alas, I must be frank. Our beloved Sky Citadel does not have the numbers to provide you with any military assistance. The prince considers you friends for life, but we cannot jeopardize our homeland by sending our small defensive forces on an offensive mission. Surely you understand. That does not mean we are unwilling to help, however. I have just finished extensive research on the Onyx Key, the artifact stolen from our vault, and it is indeed the weapon your enemies now use to move their troops unseen. The device creates a network of extradimensional tunnels—it’s a fascinating process, truly. My ancestors suspected the artifact relies on some great power source or hub positioned outside reality, and once opened a gate to it using the red sardonyx shard from the artifact’s base. But in the process, they unleashed terrible monsters that ravaged our city."
"I believe the Ironfang Legion has succeeded where my ancestors failed, conquering this hub and now using it as a central stronghold from which they direct their invasion. I’ve been divining, trying to locate the sardonyx shard for you, so you too can open a gate to the hub. My most recent spells found it deep within the heart of Fangwood Forest, but soon thereafter a powerful magic began shielding it from my spells. To me this implies only one culprit: the Blight."
Karburtin pauses here to refill your drinks and answer any questions you may have regarding the Onyx Key and its history with the dwarves. He continues after.