The Dream of Theon in Winterfell

There's an element of this dream that reminds us of a few other dreams while also seeming a little bit prophetic. Theon doesn't really have magic dreams, but he dreams of a few things that are sort of like he's guilty about things that don't have anything to do with him. And here, the foreshadowy part here is reminiscent of what we might expect from Summer Hall. It does fit awfully well, the concept of sand, because we know wildfire happened at Summer Hall.