Whizbang Dustyboots
Gnometown Hero
To be fair, the Yawning Portal is a really, really dumb idea.The Yawning Portal writeup was both odd, and completely irrelevant to the assembly of Adventures, so I think this may be about a wash with that.
Yes, let's put a giant pit in the middle of a room full of drunks. Sure, the pit goes down to where a bunch of dangerous monsters are, but don't worry: The drunks are all armed.