A Magical Puzzle Key for opening a door. Innocuous, somewhat simple, but fun to solve, if you like puzzles.
A magical barrier of acid blocks your path. Solve the puzzle to unlock the door.
A combination lock, possibly to open a chest or door or other entry point. A magical puzzle, for those interested.
Checkerboards on floors of dungeons… is there any greater bane to adventurers?
"...The people of the Dalaben Fens have a custom heretical to our superior Zodashan faith, in which they place their dead upon the grass roofs of their stilt-houses. It is said that they do this because they used to bury their dead before the great Judgement, in which their home became the swamp which it is today."-Sir Edrosh Metorva, "The Barbarian Lands of the East, Volume X."