Temple of the Living Earth

From publisher blurb:

The Temple of the Living Earth is a 3-5 session (or about 12-20 hours, depending on roleplay and combat duration) adventure for 5 7th- or 8th-level characters that takes the adventurers to a volcanic temple where they must put a stop to a powerful necromancer monk's plans to corrupt the spirit of the volcano and create an army of magma core undead.

This 17-page PDF contains all the information you need to run the adventure, including two new monsters including a unique NPC, an undead monster template with two examples, and several encounters.