Guild Wars 2

I recently discovered how many materials it requires to craft legendary weapons. One requirement is:

-500 Dungeon Tokens specific to the legendary

I want to craft the legendary greatsword – Twilight.

Therefore, which dungeon will I need to run for the 500 dungeon tokens?

Ascalionian Catacombs for the Tears, which are used to make the Gift of Ascalon, which in turn makes the gift of darkness, which in turn makes the gift of twilight. This is all off the wiki, page is here: http://wiki.guildwars2.com/wiki/Twilight