The Planet of the Horde was introduced at NFTopia 4 for the purchase price of just 2 WAX.
You can get one here, but only for a limited time. https://nfthive.io/drop/8721
Now the Moons of the Planet of the Horde are available, for only 222 DHC. You can grab one here for a limited time. https://nfthive.io/drop/8760