Anyway, I've had this written for a while now (I've also run it twice with 5E) - and so I've gone ahead and uploaded it to DriveThruRPG as a $1 download (though if you are a patron, you can download it for free).
So, I should probably tell you a little bit about it...
Thorfinn's Tomb is a two page (pamphlet style) adventure location suitable for starting/low-level characters.
The adventure itself is a system neutral, self-contained, one-shot - which should provide you with enough material for a single session of good old fashioned dungeon adventure!
(i.e. it's the kind of thing that I like to have up my sleeve for those times when the regular GM wants to take a break but the rest of the players still want to get together -OR- for a between campaign filler session -OR- just to have as an emergency back-up encounter for those times when the players go off-piste)
As I say, Thorfinn's Tomb is available for just $1 from DriveThruRPG, and if you do pick it up I'd love to hear what you think (as this would help me to decide whether or not I should attempt more of this kind of thing in the future).
Anyway, here's hoping you like it!
-note that a colorised (VTT) version of the map has also been supplied for online play-