Guilds

Guilds are your profession as well as way of life in Nightfall. You choose a guild which suits your characters behaviour, belief and way of life. For example you strive to fight for the word of god then you should consider joining the Paladins. On the other hand you might be more fond of studying the death and using these powers for mighty magic, then you are most likely a born Necromancer.
In any case joining a guild must not only be seen as a way to gather new features. And although it is possible to change guilds as often as you like, supposed you are willing to pay around 1/3 of your experience points for it is not really encouraged to do so.
At the beginning of your Nightfall career you need to join the adventurers guild. Until level four it provides you all the basics and you should use this time to learn more about Nightfall. After that you can specialize in any other guild. Although most guilds gladly take new members some do not and might require you to prove worthy or they are simply hidden so that not everybody can find them.