Ur’Lakthul was just a creature I made up. I made him up to play on Rob’s arachnophobia. I have to admit that making him draw a spider-legged ogre was funny to me.
In addition to that, I’ve always imagined Five and Dime as a clean comic store. (there are few really clean ones I’ve seen.) However, I always imagine the backroom being a nightmarish room full of terrifying creatures and undiscovered plant life. I’m not sure why this amuses me, but it does. I was glad to finally show this aspect of the store and I’m sure it will come up again.