This is a 5th Edition Adventure for 4th level adventurers by Goodman Games.
From the publisher:
Deep beneath the Trayban Monastery, a group of monks has gone missing. Your party is sent into the treacherous tunnels to find them, but you weren’t expecting to do battle with crystalline creatures that hunger for gemstones and that have overrun a peaceful bazaar in search of food. Your fellow adventurers will need to avoid the traps, find the missing caravan, repel the unknown attackers, and seal up the largest geode cavern ever encountered to prevent further attacks.