Encounter 3: The Mindbender Maze (Skullface Island, MMotRS)
Between the "maw" and the "cranium" lies a twisted maze with hidden teleportation plates spread throughout.
Encompasses 9 tiles across an entire maze room. They are Hidden (Spot DC12). When a Creature steps on a tile, they take 1d8 Psychic (ignores Defense) and teleport to another random tile. Using the same number, reference the notes below for the tile they teleport to. A Creature can jump over the tile if they see it or have it pointed out to them.
Assign the tiles like a NumPad/Phone layout with 1 being the bottom-left and 9 being the top-right. If you roll below the number of the tile they are currently on, teleport them to that tile. If you roll at or higher than the tile they are on, then add 1 to the result and teleport them to that tile.