As you can figure out, this is just a leather chest plate, but since it's black, It looks completely black. (No outline). You get 5 extra hearts and double damage when wearing this, and It has Thorns â…¡ and Protection â…¤ on it. It is called an Obsidian chest plate, and when wielding a diamond sword, you do +14 attack damage. +7 from the sword, and +7 from the chest plate.