This is a map by Dyson over at https://rpgcharacters.wordpress.com.
Farfinkle was a wizard of small renown and a great love exploring the magical arts. After finding a book of ancient lore concerning other planes he delved a little too far. Opening a gate to another world Farfinkle greeted another being into his world. Sadly the creature saw things differently and ate Farfinkle.
The creature, a Grell, now lives in the upper part of the tower.A few local monster have since moved in. Have been subjugated by the Grell to further it’s plan of creating a portal to it’s home plane.