Revive allows the Necromancer to revive almost any fallen enemy, excluding bosses, superuniques and some others. The monsters revived however will use the skills they possess normally, and will gain a hp boost as well.
Revives are extremely dumb. They do not follow you as obediently as Skeletons or Golem, and will often get stuck, wander off and disappear. The only way to reliably keep them for longer period of time is to teleport, which for a Summonancer can only be acquired with an Enigma. Regardless however, Revives die after 3 minutes no matter what.
HP = Original Creature HP +200%
The ultimate goal of a Priest of Rathma is the perfect reanimation and control of a dead creature, maintaining the purity and properties of its body while releasing its soul to allow the Necromancer full control. When a Necromancer at long last gains this ability, he can truly claim mastery of the Great Cycle of Being.
↑Diablo II Manual, page 77. Blizzard Entertainment, 2000.