after the quest is over o you can't, that's why it is advised to make them before you complete the quest.
u make them
Try following the quest help.... it would make your runescape life better....
It's currently not possible to undo a quest in RuneScape.
You can make a Blurite Sword in RuneScape as long as you are completing the quest The Knight's Sword. After you complete the quest you cannot obtain the sword again as you cannot trade the item with other players.
You get told how to during "Cold War" Quest.
Check the quest on the quest menu, make sure you meet all the requirements.
The legends quest on runescape is not gone, I suggest that you check again.
It is a cocktail that Members can make as part of the "Recipe for Disaster" quest.
A quest on Runescape is an adventure that puts you in a conflict, you solve it and you get rewards like money, skill experience points, quest points, and items.
If you quit runescape...
The quest is called "The Chosen Commander".