Haste is one of the four skins released under the Rise of the Mechanos part of the Mechanos offer. It could be individually purchased with game coins in late June 2017.
Haste could be purchased in the Skins Shop under the 'Mechanos' tab for 2900 coins. It was available for a limited time and may not be available for purchase in the future.
Details of this offer can vary depending on location, platform or time.
Note: The Rise of the Mechanos sub-offer has been released many times after the original 2017 debut. The last three releases were in January 2020, August 2021 and then in October 2021. The price for Haste remained at 2900 coins for every release.