The Shade Isle Campaign
Starshrine to Baldur
This shrine resembles a miniature Gothic cathedral, set upon the eastern shore of a great quicksand-flat in the Merkbog. There is no shrine-keeper here: even though this place is holy, it still feels grim and deathly.
When the adventuring company slept here, they received a vision from Baldur, king of the underworld: he warned them that they are now actively working against the dark god that sleeps under Shade Isle, the entity known as Izatu-Bal—and that the giant magical ruby they found in the Village of the Marsh-Gnomes is actually one of his eyes (and that the heroes should try and find some way to destroy it if they can).
When the party awakened the next morning, they gained 5,000 XP each and discovered a ring of regeneration upon the altar within the shrine.