- Spell and shadow are their friends. By darkness they move with haste, casting magic to benefit their circumstances. (in-game description)
Nightblades are effective assassins and enforcers. Their speed and skills allow them to easily reach places most others could not. Nightblades dispose of opponents with a quick blade and Destruction magic. They are also skilled in Alteration magic, and are proficient in healing themselves. It is a premade class.
Nightblades tend to favor light armor over heavy armor. They are adept healers and are good at using Alteration magic, casting spells to protect themselves, and so on. They use melee based blades to further weaken their foes while they dispatch them with their powerful spells of Destruction magic.
As the name references to, Nightblades use bladed weapons to further protect themselves. Daggers and shortswords are good to use because the Nightblade tends to be quick and agile, allowing for quick attacks while blasting their foes with destruction magic. Longswords are slower and less quick, but can be deadly if it is used just the right way with a Nightblade. Claymores are not recommended.
Since Nightblades are not naturally high in Intelligence, it is best to work on Conjuration, Mysticism, or Alchemy to gain a boost in Magicka reserves to cast more spells. Their high Willpower allows them to regenerate magic quickly, which can be used to let off more spells. Their high alteration skill allows them to protect themselves with spells such as Protect or Aegis. If an enemy is far away, a Nightblade can use Destruction spells, ranging from long distance to damage on touch.
Since they aren't skilled with Illusion magic, it may be wise to use as a side skill to cast invisibility spells, or choose The Shadow as a birthsign. They can probably be killed easily due to their lack of endurance, so it is best to also use Sneak as a side skill, too. It is hard to face hordes of enemies head-on with this type of class, also.