The Core's Keeper

Prospector Soren's notes say that Norgannon's Core is in the keeping of a sentinel named Athan, one of Mimir's creations.$B$BSoren says the vault where Athan resides is called "Loken's Bargain" these days.$B$BLoken, eh? The earthen have mentioned him.$B$BThe vault is said to be southwest of the ruined Explorers' League camp, with a round entrance on a mountainside overlooking the Valley of Ancient Winters.$B$BFind this Athan and get the core from him, but I wouldn't be surprised if you were in for a fight.