The Queen's Gambit

From publisher blurb:

A Scarred Lands Adventure for 4-6 players of APL 11-16

The necromancer Maghiel is weary of adventurers interfering with her plans to amass power, and she has devised a cunning trap to rid herself of them once and for all. Maghiel sends her trusted halfling assistant Haplo to infiltrate the party, and to convince them he escaped from Maghiel with spell scrolls that have the power to nullify her magic. The spell scrolls contain an ancient true ritual called The Censure of Mesos, which could indeed leave her vulnerable if the party successfully performs the ritual. However, in order to perform the ritual, the party will have to construct an effigy of Maghiel that incorporates a nonmagical personal item of hers such as hair, fingernails, or blood. Then, they will have to assemble the required number of competent spellcasters and proxies in an uncharted place of power called the Twisted Path, high in the Titanshome Mountains.

Vengeance of the Shunned Part 6
The Queen's Gambit is the sixth adventure in the Vengeance of the Shunned campaign. Over 20 community content creators have banded together to bring a full-length campaign to the Slarecian Vault! Vengeance of the Shunned takes your adventurers across Ghelspad on a quest to end the greatest threat to the world since the Titanswar! This campaign offers adventures from levels 1-15, and will be releasing new content weekly ALL SUMMER LONG!

The Queen's Gambit contains:

An adventure that takes the party through the Festering Fields and into the library of Lokil
An opportunity to drastically reduce Maghiel's power
Several new creatures and conversions
The continuation of an ongoing campaign coordinated by Scarred Lands Line Developer Travis Legge.