Legions of Necrons, like Legions of undead army from normal Warhammer, same possibilities and goal. i. e. to destroy all life. Necrons are a powerful ancient race, the only resource they need is energy, hordes of machines that can be resurrected after death. It is a very good army on offence and defense.
Necron Lord of All Kaurava - Main Hero of this army can be equipped with chosen relicts that will allow him to use powerful special abilities. He also can use teleportation.
Wraith - Detects hidden units, can clear control points, and got interesting defense ability.
Flayed Ones - Machines inside organic body "parts", reminds of zombies. Can be spawned anywhere in visible places of the map. When they rise in hordes from underground, they are unstoppable.
Necron Warriors - Standard infantry formation, strong in melee and distance fighting. Recruit cost of basic squad - 0. Possible upgrades; damages / Hit Points. Squad size from 3 to 9 necrons.
Immortals - Heavy infantry with destination for distance fighting. Strong against ground/air vehicles. Formation size > 3-5 necrons.
Tomb Spider - Special unit, strong in melee and after upgrade even on distance fighting. Can collect destroyed necrons and recycle them on new formations.
Destroyer - heavy fast necron, strong against every type of infantry troops.
Pariahs - Robots with organic parts. Hard to kill them, and they fight well in melee combat mode.
Heavy Destroyer - Heavy necron, strong against buildings and any type of enemy vehicles.
Lord Destroyer - Strong in melee combat mode, got very useful special abilities, e. g. they can possess the enemy's vehicle.
Restored Monolith - Upgraded to full monolith, can use teleportation and is strong against every kind of units, as well as against buildings.