The Death Knight is a monster unlike the others, in the fact that it is created. They are created by evil gods from the ranks of blackguards, fighters, rangers, barbarians, and even palidans who have fallen from grace. They are changed at the moment of death. A Death Knight is a form that can be used on any evil humanoid level 6 or higher.The character type changes to undead and it uses all the former characters abilities. But there are changes made. The following are a few examples.
Saves: Same as the character
Abilities: A death knight gains +4 to strength and +2 to both wisdom and charisma, but constitution becomes 0
Skills: Same as character
Feats: Same as character
Environment: Any land or underground
Organization: Solitary or group ( lesser undead tend within a 200 mile radius tend to gather to and follow a death knight)
Challenge rating: Same as character +3
Treasure: Double standard
Alignment: Same as character(always evil)
Advancement: Death Knights continue to advance in level as per their original class.
A Death Knights PC's effective character level is equel to the original characters level +5. They can cast any spell the original character had. Although healing spells are changed to inflict spells. It also gains the abilities; damage reduction, immunities, spell resistance, and summon mount. Death knights become immune to mind affecting spells, poison, sleep, paralysis, stunning, disease, death effects, and necromantic effects.