Some attacks will naturally flow from one stance to another, others will stay in the same stance. Each attack will always flow into another effortlessly shifting from stance to stance without interruption. You will choose a sequence of attacks in a stance and an alternative attack. Alternative attacks can be used at any time to break a sequence and then shift the fighter to a new stance.
New attacks can be unlocked from fighting opponents of any skill. New attacks can be learned when hit by the enemies with it, if you successfully blocked or absorbed it you can learn it even faster. But keep in mind you have to win in order to gain experience of each attack, get killed or run away from a fight will lose all experience. You can also learn new Fighting Styles by choosing a mentor you meet in the world. Students can use their mentor's combat deck.