Doubt Not That Stars Are Fire (5E)

From publisher blurb: A 5th Edition Mini-Dungeon for 4-6 PCs of Levels 2-3 Following mutated goblin attacks on a small, well-established mining site, the PCs find that only the pit remains. On securing the surrounding area, they must enter the steep-sided crater. They find the walls glowing with other-worldly energy, alight with “coldfire”.