Happening --<br/><br/>I am going to roll your perception check on your behalf, Wallen.<br/><br/><roll><br/><br/>Wallen, you bounce the concrete cube in your hands, inspecting it.  Although the cube is something like 10,000 years old, you are able to discern something quite extraordinary about it.  It has a "summon monster trap."  Whoever opens it will summon a possibly unfriendly surprise.  You believe that you can disarm it, but you might set it off.