Shadows of Nibarra
Illugi Swordbreaker, the Emerald Warlock, and Agera of the Shadow Face led a mercenary group called Stormcrow Company. Each had a storied adventuring background before they joined their strengths, but those stories are as nothing compared to the tales of the exploits of Stormcrow Company. The mercenaries made their base in old tunnels they found beneath a rocky tor in the wilderness.
Though Stormcrow Company was credited with cleaning the goblin tribes out of nearby hills and killing the lich who threatened the valley from its dark tower, the adventurers also accepted contracts to assassinate nobles in a neighboring city-state, kidnapped an eladrin princess in return for a ransom of questionable relics, and even burned down an entire village on a lark while passing through. In the end, they were feared more than revered.
Nearly two years have passed since any member of Stormcrow Company has been seen, and that sighting (of Illugi Swordbreaker taking ship in an eastern port) is probably only rumor. Each year that passes with no news from Stormcrow Tor is a year that nearby keeps and walled villages give thanks. Anyone with an opinion on the topic now believes Stormcrow Company took on a challenge it was unequal to and came to a bad end in some far off land or echo dimension.
Shortly before their disappearance, the Stormcrows robbed a band of smugglers working for Tarsus the Red.
At some point prior to their disappearance, Agera of the Shadow Face became obsessed with a powerful being known as Orelus. In the service of this power (primordial, deity, devil, or demon… this is not yet known), she slew her comrades. She also became undead at some point in the intervening time. She was slain when the PCs discovered her in the Stormcrows’ vault searching for Tarsus the Red’s goods.