Elementals guild was created by Nedie in Beta 5. Joining this guild was a bit unusual as you had to complete a task before you could join as well as be at least level 15 and have a vocation. This task was to kill a specific person which was written in their blackbook called the Book of Faith. Not only did you have to kill this person, but you had to physically mail their body to the leader, whose title was the Master of Fire.
The rules of the guild state that those in battle should never leave another during a fight. They should also help heal a friend if able and help any from their allied clans. Members were required to obey their Master, which likely were the Master of Wind, Water, and Earth. Those leaders had to obey the Master of Fire which led the guild. You could kill players who were found in the Book of Faith, but if you kill someone who wasn't in there, you were on your own. It is very unlikely this guild lasted long and their member roster doesn't show many players.