One Page Dungeon Contest 2016 - Sneak Peek

So, the One Page Dungeon Contest 2016 is around the corner. Deadline is May 1st, so there is some time left. This year I'm working on something quite special. Here's a little sneak peek of my work in progress:

It's been three years since my last entry in that competition. Back then I made several rather big mistakes I'd like to address here.