This was a physical letter sent out to advertise the upcoming 2024 story arc. A scan of the letter can be seen alongside another copy of the text. It was sent alongside fragments of a puzzle.
Adventurer.
Gather your allies and head for the southwest coast. I'm investigating a band of my kin that has abandoned the Pact and I require your assistance. They're well-armed and clearly dangerous. [sic] so be careful.
From what I could discern of their plans, it has something to do with the fragment included with this letter. Examine it closely and report your findings back to me personally in Grahtwood. Perhaps we can solve this puzzle together.
Don't allow any would-be emperors or Saliache ruins to delay you. And don't tell my sister. She's perfectly capable of finding trouble without your help
Beragon