I once made a home base for an elusive magic artist that is notorious for making really powerful magical artifacts with shitty side effects. Shield of Biting that bites the user, invisible invisibility cloak, Rhythm Heaven's Monkey Watch, a dagger that berates the user on misses, one puzzle that I found online that stumped the party for hours. So I made it a base with annoying puzzles. I had solutions for four out of five of them, then decided, "Eh, they'll come up with something eventually." They did the other puzzles first though, so they just came up with a solution that fits the theme. It worked.