Wights and Wraiths are level 3 creatures of Necropolis town. They are recruited from the Tomb of Souls.
"Wights and wraiths are life destroying spirits damaging their opponents by draining life. The first wight or wraith in each troop regenerates all lost damage at the beginning of each combat round. While wraiths appear on the battlefield, two spell points per turn are drained from an enemy spellcaster's spell points pool." RoE manual
Others
Wights can also be raised with Advanced Necromancy if the hero has equipped the Cloak of the Undead King.
Heroes with a specialty
Charna the Death Knight has wights as a specialty, which increases the Attack and Defense skills of any Wights or Wraiths for each level attained after 3rd level and gives them a speed bonus of 1.
Tactics and info
(This section contains a general opinion over the subject!)
The Wraiths are good to be given to scouts, since their speed is the highest amongst the Necropolis units that will probably not end up in the main army, at least not as a main troop, but just to steal mana, block shooters and get rid of low-level enemy stacks.
See also:
Skeleton
Skeleton Warrior
Walking Dead
Zombie
Wight
Wraith
Vampire
Vampire Lord
Lich
Power Lich
Black Knight
Dread Knight
Bone Dragon
Ghost Dragon
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