Melee the ropes holding up the banners along the wall to acquire a challenge. The final part that you need to get will require you to complete three challenges in the main arena. Look underneath the balcony to see a Chain hanging on the wall. The second piece can be found in the Temple as well.
This large gear can be found underneath a cage in one of the corners. Head down to the temple and look int the corners of the passageway that circles around the temple. There are three items you need to acquire, each of which can be found throughout the map. This is a useful trap that you’ll need to melt something later in this quest. The first thing you’re going to need to do is make an Acid Trap. Be aware, though, this is by far one of the most complex Wonder Weapons to acquire, so make sure you’re ready before you dive in. Once you’ve done that, you can officially start the hunt to get the Death of Orion.
Before you can get the Death of Orion, or even start the initial steps to acquire it, you’re going to want to unlock the Pack-A-Punch in IX.