*When the button is pressed, the green gem turns blue and begins to glow. Suddenly, the map location corresponding to the place where the group is currently located gains a glowing blue marker, which begins to pulse blue outwards in a circle. When it passes the marker for the next point (which is green), the blue pulse dies immediately. A minute later, the button resets to green. Pressing it repeatedly has the same result. By the best combined analysis of Rinaldo's knowledge of strange devices and the Detect Magic spell analysing the flow of the trigger spell, whatever this button does, it only remains activated for one minute.*