This is the golden weapon skin which came when you pre-ordered Tera Online and paid for your first month of subscription from Tera Online. The only way that you could still get this is if you pre-ordered the game and paid for your first month during pay to play times but never received your weapons in the item claim. Or if you buy an account from someone which has it. The black dragon skins look the same only black colored.
This was apart of the dark side items which where released this can be bought though the EMP shop as either permanent or temporary items.
This came out shortly after the release of the black dragon weapon skins this can be bought from the EMP store in permanent or temporary versions.
This was apart of the ice weapons items that got released this can be bought though the EMP shop as either permanent or temporary items.
This can be bought from the EMP shop or you can get them from the Ice Box by RNG chance these can also drop the Ice Grip version by chance as well. This version is similar only the lance glows for these weapons regardless of whether your weapon is master worked or not.
This is apart of the food items that got released to Tera Online this can be bought from the EMP store as a permanent or temporary item.