What it is:
* A form of currency: Obsidian is a digital currency earned by selling items on the Trading Post.
* Not directly usable: You can't buy items in the shop with obsidian; it's only used for making offers on items in the Trading Post.
How to use it:
* Making offers: When you want to buy an item from someone on the Trading Post, you can make an offer using your obsidian. The seller can then accept or reject your offer.
* Pricing: Obsidian is used to price items in the Trading Post. The higher the price, the more obsidian is required to buy it.
* Obtaining: You earn obsidian by selling your items on the Trading Post. The amount of obsidian you receive depends on how much the item sells for.
Other important points:
* No cash value: Obsidian is not real money and cannot be exchanged for real currency.
* Fluctuations: The value of obsidian can fluctuate depending on the current market demand for items on the Trading Post.
Essentially, obsidian is a virtual currency used to facilitate buying and selling within the Neopets Trading Post. It's a vital part of the game's economy, but it's not a currency you can use to buy items directly.