This ruined stronghold is thought to have once been the base of operations for a cult dedicated to the worship of evil dragons. Since it fell into a rift near the Ashen Plain, it has become the home of the goblins who sell the magical fruit to the highest bidder in Oakhurst each Spring. The Hucrele children and their companions are thought to have disappeared near the Sunless Citadel sometime during February, 103 CY.
. . .
The adventurers encountered little more than traps, rats, and undead until they came across a lone kobold sobbing beneath a ragged blanket. This creature, Meepo by name, told them about being outcast from his tribe after the loss of their dragon Calcryx, stolen by the goblins. He took them to meet with the kobold leader Yusdrayl, who hinted about the missing Hucreles and tasked them all with recovering the missing dragon.
Accompanied by Meepo, the party discovered the body of one of the adventurers – Sir Braford. They fought their way through the first of the Citadel goblins and rescued a dwarf prisoner called Erky Timbers, who told them a little more about the fate of the surviving adventurers and the true power of the Citadel – a man known as Belak the Outcast. The dwarf joined the crew and the five heroes encountered the red dragon wyrmling Calcryx. After proving their strength to the creature, Meepo convinced him to return to the tribe as an ally instead of a pet. Yusdrayl rewarded the heroes for their success and Meepo left the group.
. . .
Pressing forward, the heroes slowly fought their way through the rest of the goblin tribe and defeated their chieftain, a brutal hobgoblin called Durnn. Here they encountered the first of the plant abominations called twig blights. Owen left the group when he discovered tattooed back flesh hanging from Durnn’s wall – all that remained of the ranger Karakas. Erky left when Owen did, figuring that they didn’t have a real chance without a proper warrior, but unable to deter Aramis and Azal from continuing on anyway. Fortunately for the determined duo, Bhavik showed up and agreed to join their quest in exchange for them helping him discover the source of the twig blights.
Descending the open well in Durnn’s throne chamber, the three heroes entered the grove level and began battling the bugbears and goblins devoted to Belak and uncovered a few of the Outcast’s sinister experiments. They infiltrated the Twilight Grove itself, and confronted the man who held their friends captive. After killing him, they still had to deal with the results of his apparent villainy. Talgen had been transformed into some half-plant creature, and Sharwyn had narrowly escaped the same fate. Azal set the tree ablaze, and as the oily smoke from the fire threatened to suffocate them all, they fled the Twilight Grove, and returned to the surface with the Hucreles and the spoils of the Citadel.