The Vile Worm of the Eldritch Oak

From publisher blurb:

An adventure for 4 Characters of Level 1-2

Deep within the forest, an ancient oak has grown huge, twisted, and evil. Ages ago, a savage cult haunted these woods and this tree became the catalyst of their unspeakable rites. Below it they carved out a chamber of sacrificial horror where innocent victims were offered to a hideous worm-like god. As the centuries passed, the cult faded into the mists of time, but the twisted old oak stood fast, awaiting the day when the creeping evil in the dark below would be summoned once more.

This module includes:

five illustrations
full-page map
two new monsters
two new magic items