Having a way to bait out the major threat that was pushing its luck within the Sigil continent was already great news. Walker was sure that as this news spread, he would be finding more and more people who had been able to make better advances in their own areas of expertise.
The royal dragoons fully returning to Genesis and their elder dragons beginning to set up their new homes was already beyond what everyone had been expecting. The elder dragons joining meant that there would be a powerful force to combat the strongest of the undead corrupted monsters controlled by the demon lord.
However, the idea was to weaken the forces that could protect such a place.
Many of the kingdoms had war strategies that relied on whittling down the numbers of an army. To make the strengths something less than what it should be.
Creation is hard, cheer me up!