Moon Ship is one of the four skins released under the Dawn of the Empire offer. It could be individually purchased with game coins in December 2016.
Moon Ship could be purchased in the Skins Shop under the 'Space Battle' tab for 2900 coins. This skin was available for a limited time and may not be available for purchase in the future.
Details of this skin can vary depending on location, platform or time.
Note: The Dawn of the Empire offer has been released many times after the initial debut in 2016. The last three releases were in September 2021 (Mobile), October 2021 (Mobile) and then in November 2021 (Browser). The price for Moon Ship remained at 2900 coins for every release.