While playing in the forbidden city with Karim and the others (the architect and the 
fire fighter) there are stone effigies that one can use to collect a special item. 
The first one is collected by Karim-the ruby effigy. The second one is collected by 
the architect. To get this one you'll have to keep using the reveal invisible spell 
that you cast to walk over the pit of lava and collect the key. After surveying the 
area,while the spell is still being cast,exit the room and on your right side should 
be a small shelf with a sapphire effigy. If the spell is being cast then you won't 
see it,so cast it again if it wears off to soon. The 3rd can be collected by Michael 
the fire fighter. He will then have all three as the other two are collected by the 
architect in the beginning. Now take them to the room with the cirle in the middle 
where you crushed the zombie with the architect. Go through the door on the left. 
After killing the zombies you'll see a door, a large stone pillar,and an empty wall 
that has an invisible door. Go through the small door and you should find three 
large pictures of a warrior, a wizard, and a scholar. Place the effigies so that the 
green is under the red, the red is under the blue, and the blue is under the green. 
You must do this in this order or a horror will be summoned. A secret passage will 
be opened in the room you came out of. Here you will find an enchanted gladius. You 
can use this to fight the boss in the very end so that you don't have to keep 
enchanting your own.
Submitted by dannitohoot