1 Darth Vader: I’ve been waiting for you Obi-Wan. We meet again at last. The circle is now complete.
2 Darth Vader: When I left you I was but the learner, now I am the Master.
3 Obi-Wan: Only a Master of the Dungeon, Anakin. Now take off that silly costume and let’s begin.
4 Darth Vader: {sitting at a table behind a Dungeon Master’s screen, helmet off, scarred Anakin head visible} Fine. But let’s just see how long your PC survives the Tomb of Horrors.

This is the random sort of stuff that has been sitting in my ideas file for getting towards 20 years now. This was suggested by a reader very early on, and I've lost the name of whoever suggested it. If it was you, thank you!

Ah, Tomb of Horrors. One of only two D&D adventure modules (in)famous enough to have been mentioned by name four times before in IWC^[1] (twice in the actual comic, four times in the annotations).

[1] The other being Ravenloft. Which also gets shown twice more in photos, but without being named. But this is mostly because I happened to run Ravenloft during the course of IWC and had several anecdotes to write about it.

The Keep on the Borderlands gets mentioned twice.

I suppose this is the time to mention other classic adventures that I haven't mentioned before, such as Expedition to the Barrier Peaks or Against the Giants.