30 Days of Dungeons & Dragons Day 13

Day 13: Favorite Trap/Puzzle

This is a hard one, because I am fond of a few specific tombs known as the Grimtooth's Trap series and it would be hard to pick just one from among so many. If I had to choose, though, I would say it was probably this one, which worked to great effect the three times so far I have deployed it:

I like that day 13 had this question, feels appropriate!