Since I possessed the orb before, I'm bound to it by... the rules of... ghostliness? Yeah, those.
I'm pulled toward the orb, but the shield repels me. I am helpless against the magnet-like forces of my own spiritual gravity and the shield, and am stuck in a perpetual 360-degree orbit around the orb.
I try to dematerialize myself and see if I can get far away enough from the orb for the Rules of Ghost Society to not apply to me and the orb. I respawn myself in Antarctica. It worked! But... I'm still on the orb... how'd it get here?
...My powers affect the orb! I can't actually
get the orb, but I
can try to keep everybody else from getting to it.
To summarize, I'm bound to the orb, but can't touch it. I'm in Antarctica. I can move the orb and do stuff, but the orb can still roll around and whatnot. Like a two-headed snake.