From these comments, I want to ask "What is a dungeon crawl?", but does it feel worthy enough?:
I would add the concept of the dungeon crawl where a band of diverse adventurers (wizard, fighter, elf, etc.) battle monsters in an underground setting, including a final boss monster, is straight out of the Mines of Moria from J. R. R. Tolkien's The Fellowship of the Ring. – RobertF 1 hour ago
RobertF: I think that point is worthy of its own question about "what is a dungeon crawl" ... I don't know if that particular scene is linked to where "dungeon" comes from. I agree that the template parallel looks obvious. – KorvinStarmast 56 mins ago