You start futzing with the goings-on up north, eventually you'll bring down an Oni warlord.
When an ogre mage dons amazing armor and gains levels in magus, you get this asshole. Be prepared to face him and wave after wave of ice trolls and frost giants as he cleaves into you with ten solid feet of razored steel.
Oh, also, he's got a Numerian weapon of otherworldly origin, one that burns flesh from bone with an ease expected from a village idiot defiling the town fountain.
I'm sick and tired of being tired and sick, but I did get this going. Hope you enjoy.
It made sense at the time.