This is easily my favourite of all the submissions and I'm puzzled it's not at the top of the rankings. There are so many things for the players to interact with. The boulder that might get "inked", the unique monsters, the hidden passphrase, the phantom chariot, the secret chamber, random teleportation, and the miniature colosseum interaction (!!!) are all excellent, to name only some of the stuff packed in here.
It's presented in a clear and concise way, with a fun introduction that incorporates player input into some of the magical effects in the dungeon. The text is so easy to follow that even as a novice GM I feel confident that I could run it on the fly, with maybe only a few minutes of prep to review the monster stats/effects.
It's clearly a deadly one-shot / challenge dungeon for experienced players who know what they're getting into in terms of lethality. Even though my regular game is a campaign for beginner players, I could easily see myself using this as a fun interlude or an "establishing shot" for a transition to a harsher Red Sands / Dark Sun type region/setting.