((Can I request some more info on the runners, besides that they think we're tasty and use bows?))
The runners are known to be from a far country, far to the southeast of your homeland, but on the same continent. They are very large, larger than humans, and are exclusive herbivores. They are quadrupeds with a humanoid upper body and a third pair of limbs, and are called 'runners' because they move around quickly but do not fly. Historically, relations were cool with them, with limited amounts of trade, a significant language barrier, and a little residual hatred from the times the birds were more magical, as they feared you then. Little is known about their history or religion, except that they have been on this continent since time immemorial.
Some communication is possible, through a loose trade creole, but it's difficult to make complicated treaties or agreements.
As for their lifestyle, little is known since hostilities have began, but they are mostly a rural people, albeit with several cities of significant size. It is also known that they are divided into different tribes, each one with it's own dialect, and usually, capital. Their estimated population is somewhere around two or three million, spread out over a great area.
The particular ones that are attacking the birds seem to be of a few different tribes, making it more difficult to make peace, as one tribe may not respect the deals made by another. In addition to that, for the last few decades, there have been an increasing number of maddened runners which seem to be intending to kill or die, rather than hold territory.
There isn't a lot of respect or desire for the manufactured goods of the runners. Their agriculture is fairly primitive, their goods (outside of some decent pottery and glass) are rudimentary, and they have little magic and relatively crude technology. The humans that you traded with from across the sea have much more that is desireable. Outside of their bows, they have little other than spears as weapons of war.
Find Replop, god of healing and construction. Follow the signs on the stone and the feeling of divinity.
{Wisdom Check -> failure}
You reach out with your mind, and encounter another intelligence. Some words appear in your head:
"Hello, Replop. Been a long time. How have you been?"
Ask Mr. Seal why I came here after accepting some scrumptious squirming deliciousness. Inquire as to his shuffleboard habits.
The seal looks at you quizzically. "I don't know. Maybe you want to worship me again? Was very amusing. I'll give you some fish."
"What's shuffleboard?"