Adds Obsidian ore which is used to create Obsidian ingots. Also adds Obsidian stick which is created by crafting two blocks of obsidian to get 4 sticks. You can craft a block of Obsidian using 9 Obsidian ingots.
The Obsidian sticks and ingots then allow you to create Sword, Axe, Pickaxe, Shovel, and Hoe.
