The pair of Magewrath sprues are sold together with the balewind vortex. I thought it would be good to post an image of both of these sprues for the sake of completeness (and to complement the balewind sprues). As can be seen, the upper portion of the magewrath fulcrum consists of a throne that comes in only a few (detailed) pieces. The tower upon which it rests (lower image) is simply four (yes four!) big skull towers -- each effectively being one side of the magewrath "wall" and simple-looking to assemble. Even if the mage-wrath throne doesn't look as 40k as the balewind vortex, I think the skull tower will see use regardless!