They Dug Too Deep

The Dwarves have long mined the mountain they live in. Ever down, ever for greater wealth. Dangers have always been present, from fungal spores that zombify dwarves, to clans of angry feral goblins. The giant spiders and cave crawlers were dangerous, but manageable. But now…now the Dwarves have released something. But what else would you expect, since… They Dug Too Deep.