Mineral Powder

Mineral is the weakest among the five powders, and is the simplest to create.
It targets the easy crafted and most commonly found items such as cobblestone, wooden planks, Redstone, mine-carts, and basically anything else that is simple to get/craft.
   
Krag Powder

Krag is the second in the list, giving it is the second easiest to create, but it unlike all the other powders it not limited to any sector of items.
It can randomly give you any item from dirt blocks to diamonds.

Diamond Powder

Diamond is the third powder giving because of its medium strength. It can turn Mythical Goo into any medium level item such as TNT, Obsidian, Mycelium, Blaze powder.
Some Items that might not seem useful but are still slightly difficult to obtain or find are still placed here (Mycelium being the example).

Emerald Powder

Emerald powder has the magical ability to generate potions and enchanted books from the Mythical Goo.
From regeneration to harming potions and punch to sharpness enchantments Emerald Powder can mold it all.

Vulcan Powder

Vulcan being the strongest powder is used only for one purpose, to supple the rarest and more precious items such as Enchantment Tables, Golden Apples, and Diamond/Gold products.
The most rare and desirable items are placed molded from the Vulcan Powder.

Ender Gem Stone

The Ender Gem Stone is part of the AATI mod (ASHninja's Automatic Item Teleporting).
 In the Magic Box mod it allows Items to automatically teleport from the Magic Box to a chest (as long as that chest has a Ender Gem Stone in it).

Impregnable Stone

The Impregnable Stone is a ancient stone that was once a whole, but when it crashed in the world it burned up in the atmosphere and split off into smaller portions that went various directions.
Inside the stone is Mutable Goo and the only way to obtain it is to break the Impregnable Stone with a Diamond Pick-axe.

Magic Box

The Magic Box is what this entire mod is based upon.
It has the ability to contain the power of five certain powders: Mineral, Krag, Diamond, Emerald, and Vulcan.
It takes the fumes produced by these powders when burned and concentrates it onto a item commonly known as Mutable Goo. When the fumes come into contact with the Mutable Goo it can mold it into something else. Any Item that can be found or crafted in survival mod (with a few exceptions) can be created using Mutable Goo. The Magic Box is also equipped with the AAIT (ASHninja's Automatic Item Teleporter) feature that allows, in this specific mod, to automatically teleport items generated from the Magic Box to a chest (as long as that chest has a Ender Gem Stone in it)(AAIT, Not Yet Implemented!).

Golden Leather
Diamond Leather
Magic Box
Impregnable Stone
Vulcan Powder
Emerald Powder
Diamond Powder
Krag Powder
Minerial Powder

AAIT Mod (ASHninja's Automatic Item Teleporation)

The powder concepts, and anything else you suggest to perfect.