Requirements for new Element
When obtaining you second element you must train with your teacher, there is a 1.5k post minimum, that's not just in one post but all your posts together in the thread.
Learning your third element will need to post a 2.5k minimum word training post weather its alone or not. (Clan elements are already known upon character registration but shall not be used until second element is learned)
For Fourth and fifth elements you must have approval from a mod and he/she will tell you the requirements, but they will be high.