Ultra Hardcore (UHC) is a modification to Minecraft that removes automatic healing from the game. Now, you can only heal by using Golden Apples! But that is not all - instead of Golden Apples requiring 8 golden nuggets, they use golden ingots instead.
After connecting to the server, you have two options. Ultra Hardcore rounds begin once 4+ people sign up using the command /play. Once the game starts, it's a battle to be the last one standing. Whether you'll spend your days mining for good weapons or looking for enemies, the choice is up to you. Don't have enough people to get a game started? Get your practice for UHC by going to the survival world, using the command /survival, and return to the lobby using /lobby.