Sky Element is the map survival style skyblock. More than 100 Islands, floating in the air. This map has many different secrets and quests. You will need to complete quests, complete the monument, look for the caches of loot to eventually defeat Sky Element.
The official Minecraft launcher - this launcher is available for download on the website minecraft.net. In order to play you need to create an account on minecraft.net and to buy the game, then you will be able to log in to the launcher with your credentials and play on any license servers