Backer Bret Woods gave me several suggestions, including this one:
... view from the bottom of a pit peering up, where monsters lurk below but cannot be seen by an adventuring party who is lowering one of their party members down the side of the pit on a rope (or some variation of this).
I liked this one for a couple of reasons, including the opportunity to draw another monster, but also because it was a chance to draw an interesting point of view. I’m at the point where I’m almost done with these visionary illustrations (just three more left that I know of!), so I’ve begun ordering them in the book and this one will fit nicely in the monsters section, right next to Spider, Giant.