The undead system works like this: Human units change into zombies when dead, zombies turn into skeletons if toasted by fire magic and if a magic attack blows away their bones, the skeletons become ghosts

As readers will already know, the characters in Ogre Battle 3 are capable of changing their class when reaching a certain experience level. After a class change, the Griffon, ordinarily capable of the special "Wing Shot" attack, acquires bear-like qualities and changes into the Opinincter, now capable of the more powerful "Wing Storm" magic attack.

The fiery two-headed Hellhound acquires an extra head after a class change, and becomes the much more fearsome Cereberus, capable of the terrifying Black Magic attack called "mesmerize."

The sorceress, belonging to the female magician, or witch, class, becomes the Siren after moving up a class. The Siren's knowledge of spells is far greater than the sorceress, so she is a far more formidable opponent.