I understand now. The sand and the water are just representations of what is really happening. They are just illusions designed to confuse me. I can control more now, move my hands when he is not paying attention, and Indrid does not pay much attention to anything anymore. He is completely obsessed with that book to the point of ignoring everything else.
If Indrid Cold is not stopped soon he is going to find the arc. He does not even know what the ark really is, or what it really does. He just wants to burn the world and I think I'm the only one who has the opportunity to end him. My plan of action is simple, I'm going to end us both.