Saetern123 wrote:
Magic stone of Astral(Lvl.3) what does that do? and how much is it worth? I have 2 of these tablets made and ready..I have no idea what it does..-.- help please.

AFAIK, Astral can ONLY be purchased from the item mall and CANNOT be sold/traded to other players (unless you CCF or have a friend who bought it for you and already added it to your weapon/item or bought you silk from your account). Curiously, why did you buy Astral if you didn't know what it was used for?
As was said before, Astral prevents the item/weapon from returning to +0 when trying to get to +5 and higher. ex. if the item/weapon is at +4 or higher and has Astral and if an elixir fails, the item/weapon will remain or drop to +4. If no Astral is present and the elixir fails, the item/weapon drops to +0.
Keep in mind that you have to have Immortal on the weapon to use Astral (either Immortal already being on the item/weapon or being purchased from the Item Mall).