Blessings, Deceit and the Well of Demons

While the heroes sleep in the Horned Helm, Ivgaar the Plunderer is visited in his dreams by his patron diety, Kavaki, the Ram-Lord. When Ivgaar awakens, he finds that he has received the mark of the Ram-Lord and has gained access to new powers. Ivgaar takes this as a clear sign that he is indeed a chosen one of his people and of his god.
The party returns to the Seven Pillared Hall, where the 13 rescued captives decide to stay until the party can safely escort them back to Riverdown. While replenishing their supplies, Vythica and Zaradei try to gather any information they can on the blackfang gnolls when they are approached by a courier who delivers a mysterious message.
Signed only with the letter R,  the letter claims to be from a member of the organization behind the recent kidnappings who has been looking for a way out. The letter also contains a map and requests a secret meeting with the party. Though the group suspects a trap, they have no other leads to go on and head to the appointed meeting place.

Upon their arrival, the party's suspicions are correct when they are attacked by a drow, a tiefling and an Iron warder. After a pitched battle, the iron warder is destroyed and Rashook, the drow, has been taken captive. Searching his satchel reveals several scrolls: The first contains instructions to find and kill the group of heroes, and then to bring their corpses to the Blackfangs, signed by Paldemar. The second letter is addressed to Maldrick Scarmaker, the Chieftan of the Blackfang gnolls and offers the corpses of the party as a token of friendship. The final scroll contains directions to the hideout of the Blackfang Gnolls in the Well of Demons.
The heroes are able to squeeze two pieces information out of their captive through intimidation; that whatever Maldrick is up to in the Well of Demons is intended to be a distraction and that Paldemar is hiding in an unknown location called "The Tower of Mysteries". Before they can extract any additional information, Rashook swallows a poison capsule that was hidden in one of his teeth and begs Vecna for mercy as he dies.
Eben and Viserys, connecting this plea to Vecna with Paldemar's new title "the Erudite", suspect that the missing wizard is likely a worshiper of Vecna, the lord of Secrets.
The party quickly returns to the Seven Pillared Hall with this new information and present it to the Ordinator Arcanis, who seems to share their suspicions. Unfortunately, the Ordinator doesn't know the location of the Tower of Mysteries, and bids them to delve into the Well of Demons, as it is their only lead. Rasic harbors suspicions of the Ordinator Arcanis, but the party continue on to the well of demons.
The group hatch a plan and borrow a wagon from Rendil Halfmoon. Vythica disguises herself  as Rashook, the drow, and presents the wagon of "dead" adventurers to the Gnoll guarding the entrance to the Blackfang complex. Vythica demands a meeting with Maldrick Scarmaker, which confuses the Gnoll guard. When he retrieves the Gnoll beta, the party springs a surprise attack that makes quick work of several of the gnolls.
Unfortunately, as the heroes a surprise attack on the gnolls, some denizens of the well launch an attack of their own and the battlefield becomes chaos as a ghoul, cave chokers and a phalagar wade into the fray.... The heroes engage this new threat, and though the tide of the battle seems to be turning in their favor, Vythica is pulled over the ledge into a deep well, seemingly to her death. As her body breaks with a sickening crunch on the rocks below, Vythica find herself alone transported to a sort of purgatory where she is visited by an aspect of the Raven Queen, who offers her a second chance at life, but at a price: if Vythica wishes to remain in the material plane, she must kill those who have been marked by the Raven Queen. Vythica agrees to the terms of the Raven Queen's offer, and finds herself restored and back in the Well of Demons with her allies, as if no time has passed, blessed with new abilities as a gift from the Raven Queen.  The heroes are able to wipe up the remaining threats and, after some questions are answered, they prepare to delve deeper into the Well of Demons.