Their Strength, My Strength
Other than high mountains with signs of artificial cave dwellings deep within them, the territory of the energy vein had deep valleys and cracked landscapes. These were the scars of endless war and slaughter for the forceful occupation of this land, at least that was until Xavier and company invaded Arcadia.
To cope with the ruthless intervention, each faction involved decided to back down, save for the Elven and Beastkin Domains, who were led to continue fighting under the presence of either a debt of blood or in the name of honor and grace.
Soon enough, the beastkin forces pulled back while the stronger tribes didn't offer any hints of preparations for future retaliation. Of course, they didn't think a retaliation was necessary since the beastkin who involved themselves with the struggles of the world without enough power had no one but themselves to blame.