In battle, JP are rewarded for every successful action. JP are used to learn new abilities within each job class. Accumulating enough JP results in a job level up; new jobs are unlocked by attaining a certain level in the current job class (for instance, to become a Priest or Wizard, the unit must first attain Job Level2 as a Chemist), which also allows the character to gain more JP in that class in battles. Once all the abilities of a job class have been learned, the class is "Mastered". A soldier in a specific Job always has its innate skill equipped (Wizards always have "Black Magic," Knights always have "Battle Skill") but a second job-skill slot and several other ability slots (Reaction, Support, and Movement) can be filled with any skill the particular soldier has learned.