Just some musing on magic in this. 

I'm thinking that in order for an air wand to work, it must first gather together the air element from its surroundings, am I right? So the handle must be hollowed out and a piece of clear quartz is put in there. The spell is then carved as runes into the wand, while the handle acts as insulator. As the spells are cast, a bit of the quartz is consumed, and perhaps when exhausted, the wand itself is consumed, becoming ash.

The more powerful the spell, the thicker the wand handle has to be, until you reach staves. Master-level wands have to be that big in order to write out the complex spells and is filled with amethyst. It also means there's a longer charge time - or is it constantly charging from the area around it?

We know if you have a tome and attuned to the element, you can learn to cast elemental spells - but then there's still the problem of gathering the appropriate mana from the surrounding area. Perhaps an amulet would help? Like obsidian or morion for those summoning the dark? This could be jewelry - a ring, a bracelet, a necklace, or earrings. Jewels encrusted into a sword or knife hilt, perhaps?

I was asked if Ned's wool cloak was magic? So would that also need some element appropriate for the element to be used? Either fibers woven into the cloth or say a piece of agate as an attached amulet?