Nether Biome Concept (2/10): Wither Canyon!

I am making a chain of these biome concepts that link together on some occasions. Check the others out! Wither Canyon is a biome that has a dark ambiance. It is hard to see and light levels are cut in half. The floor is fully soulsand. Nightlock Trees (Nightlock Forest). You can find a Nightlock Forest appear here too. The wall are made of a new stone type found in this biome called Wither Stone. Wither Stone can only be broken with Iron Pickaxe or higher (Gold breaks it faster). You get all the stone items like you get from regular stone (Walls, Stairs, Bricks, etc). You can get Mossy Wither Stone by using red vines (Nightlock Forest). Mobs you can find here are Wither Skeletons, Ghasts, Endermen, and new mob, Wither Skeleton Horse (Wither Skeleton Horse). You can also get a new set of items called Wither Tools that only make pickaxe, axe, and swords. These tools are more efficient than diamond in the nether, but less efficient than diamond in the overworld. For example, you can mine Wither Stone faster with a wither pickaxe than you would diamond, but mine it slow in the overworld with regular stone. Same goes with axe. You deal more damage to nether mobs with the sword than you would diamond. Durability is better than iron, but worse than diamond. What else can you find here? A new structure called the Wither Castle (Wither Castle). Overall, you get a new stone type, new structure, new mob, and new tools.