Dark Druids

From the back cover:

"for Levels 9-12

Beware the Misbegotten

In Fang Forest dwell a fanatical sect of druids bent on the ruin o fthe innocent. Under shadowy caves they command dark forces of nature and magic never before seen in the lands. With the fall of another human settlement to the druids' evil, the good priestdoms call for their destruction.
Gather Ye Heroes

To root out the malefactors, bold adventurers must travel through the forest's haunted confines, enter the druid's base, and gain access to an eldritch sorcery that alone can stop the Dark Druids."