The angry visage of Lu appears before the Plains Vri, manifested through Atu's magic. You have angered me for the final time, people of the plains. I sent you my boomerang so that the strong may lead the hunt and defend the tribe. I sent you my servant to give you the gifts of knowledge, strength, and vitality. He chased off a traitor and corrupter in your midst, one who would subvert your mind and twist your souls until you thanked him for ravaging your being into nothing but empty husks. Yet in light of these gifts, you spit in the face of my emissary, and refused the gifts he offered. Such an offense has not gone unnoticed and with my dying breath, it will be punished. Think long and hard people of the plains, of your insolence and your future, for the next time you see Atu, he will be there to slay you. Pray for your salvation, pray for my mercy, but do not dare ask for strength, for you have rejected it.
With that Lu sends Atu to the mountains to talk to the raiders there. Atu is to deliver the following message in the same manner as his message to the Plains Vri (using magic to display a hologram): I am the God Lu, lord of strength and king of might. I delivered my boomerang to the Plains Vri and made them strong enough to repel you. They responded to this gift with insolence. For this, I shall repay them in kind. I have come to you to offer you unimaginable strength and magical power. I come to offer you the plains, and all of the bountiful rewards that the Plainsmen have denied you all this time. Worship me alongside my fellows, and I will give you the world. To show you what is to come, I offer you this, The Obsidian Gauntlets. The Vri that follows my warbanner and proves himself most alligned with my house will receive this gift. Forged in Diaq itself by the smith guard as payment for my creation of the mountain potatoes that sustain you now, these gauntlets will make any vri who wears them the strongest Vri in the world. What say you mountaineers? Will you accept my offer?
Have Atu deliver the two messages above. Have him spend time with the mountain folk helping them, making them strong, training them in combat, giving them blessings, and preaching of Lu (basically trying to win them over). Also have Atu aid the mountain Vri on any raids, other military endeavors, gathering mountain potatoes, and anything else the Vri are doing that he could help with. Offer the Obsidian Gauntlets to the most devote of my followers.
Bonus secondary objectives: Capture some craftsmen to gift to Exkit and recover Lu's boomerang.
Minor Act: Lu moves to the riverlands and tries to soak up some of that unaffiliated worship there.