Chaos Knight is an enemy from Final Fantasy IV: The After Years. It casts powerful magic like Tornado, Firaga, Blizzaga, or Thundaga.
In the PSP version, however, he fights differently. He will cast Doom, Death, and sometimes Tornado, following up with a physical attack to whoever he used Tornado on. He also constantly counters any attack mostly with Doom, and rarely with Death. This makes Chaos Knight a considerably more dangerous enemy.