The cursed crown is found in the badlands temple. When worn, it replaces all but one of your hearts with absorption hearts, which regenerate after 8 seconds of not taking damage. All healing sources aside from golden apples no longer heal you.
It comes with curse of binding. It also gives 3 armor, has 500 durability, and can be enchanted with any helmet enchantments.
It is repaired using gold ingots. It also counts as gold armor, so piglins won’t get angry at you.