Dark Knight is a recurring job in the Final Fantasy series. Dark Knights use Dark Blades as weapons and have a special attack that takes their Health to damage an enemy. Notable Dark Knights in the series include Cecil Harvey.
Main Article: Dark Knight (FFIII)
Dark Knights are trained to harness the negative energies that flow throughout the world. The dark blades they wield are very effective against monsters that divide and multiply. (Game Description)
Main Article: Dark Knight (FFX-2)
Dark Knight is a dressphere that raises defense, but lowers agility. It also allows the user to cast Darkness, which sacrifices HP to damage an enemy.
Main Article: Dark Knight (Bravely Default)
Dark Knights utilize abilities that make them stronger when their HP gets low or they are attacked.
Related Threadsknight, or dark knight? - last post by @ Mar 23, 2008
Holy Knight, Or Dark Knight - last post by @ Mar 7, 2013
The Dark Knight Job - last post by @ Nov 2, 2008
Dark Knight Bug - Need Help! - last post by @ Nov 4, 2010
Onion Knight/Dark Knight info - last post by @ Jul 29, 2013