If our going up against metal armor after u found all the pieces of the of the ornament to get to the door on the other side you need a shot gun and some shot gun ammo and some flash grenades (the purple ones) there are parasites in the armor u need at least 4 because their is a second wave of armor after u beat the first wave of armor the door lifts up get the queens holy grail if u have the kings grail put the kings grail to the statue on our right and the queens grail to our left then the door will unlock.