Refined Obsidian

Refined obsidian would be a great way to harden obsidian. Smelting Obsidian in a blast furnace gets you soft obsidian. Dropping it in water gives you cooled obsidian. Repeating this process gets you molten obsidian when smelted, (which can be dumped on your friends, giving them a speed debuff and killing them faster than normal lava. Although, once placed, you need a bucket to claim it. Then just smelt it again to get molten obsidian and your bucket back) and refined obsidian when cooled. Simple. This is a harder version of obsidian, and can be made into armor, tools and a new enchantment. (see Obsidian Armor, Tools and Medius) What else could the types of obsidian be used for.