Forgive and Regret (5E)

From publisher blurb: Forgive and Regret is an 8th-level adventure about unintended consequences. The sins that stained the blighted Wytch Bog more than two centuries ago still linger as the villain who perpetrated a genocidal act longs to free his tortured soul from his undead bonds. In his warped mind, only more violence can garner his freedom, placing the innocent descendants of his long-deceased conspirators — and an entire region — in his crosshairs.