Engine Prototype #4 was built as a siege weapon to break the standstill while trying to breach the Elven city of Cullebra. It’s new offensive system dubbed the Arcane Mortar , is viewed as one of the most destructive forces in all Terescence.
While traveling trough farm land the PCs come upon a merchant sitting on a wrecked wagon without a mule attached to it, hid face burrowed in his hands. He explains that he was robbed by petty goblins, unable to defend himself he had retreated. He asks the PCs to help him retrieve the mule before the goblins roast it, as a reward they may keep his goods. How hard can it be?