[X] Sacrifice Lotsa Stuff To The Pit. To honour Zorbag and how good he was at hunting, clearly they need to hunt a bunch of animals (maybe somewhat smaller than that snake) and throw them into the glowing pit. That way, Zorbag's luck will pass to them.
[X] Pile Some Rocks Up In A Vaguely Orkish Shape. Maybe if they get rocks and bits of fallen masonry from the ruined factory and pile them up into a shape, that'll be like Zorbag is still watching over them.
-[X] Using highly advanced remote manipulators (I.E., grots tied to long sticks), get two especially glowy rocks from the pit. If the glowy rocks are placed in the rock pile vaguely where eyes would be, it will be even more like Zorbag is watching them, and also look zoggin' cool!
Unless I'm promised a Solid Snake Ork from the snake statue.