Minecraft wiki entry for Half_hearted_hardcore, associated text: This difficulty is only for the best of the best players and you need to have definitely had a massive amount of experience on Ultra Hardcore, as well as the normal hardcore. You also need to bear in mind that even if you do meet these requirements, you need to accept the fact that it is extremely easy to lose your world, even if you have the strongest armour and buffs possible. All of the rules for hardcore and ultra hardcore still apply, so read them first.