Flayed Ones

Any model with the Necron special rule that is reduced to 0 wounds, or would otherwise be removed as a casualty, is instead laid on its side to show that it's damaged. At the start of every Necron turn, damaged Necrons with 6" of a model of the same type may self-repair. On a roll of 1-3, remove the model as normal. On a 4-6, the Necron is repaired and stands back up with 1 Wound remaining and joins the closest unit of the same type. 
A model cannot self-repair if it was destroyed by a close combat weapon that allows no Armour saves or any weapon whose Strength is twice the Toughness of the Necron. Models destroyed due to a failed 'Death or Glory' attack may not be repaired by any means.
Necron Lords do have need to have another model with 6" in order to self-repair.

If a Necron army is reduced to 25% or less of its original number of models with the Necron special ability. it will disappear in an eerie fasion, leaving behind nothing of its presence. This gives an automatic victory to the enemy, regardless of the victory conditions of the scenario being played. Do not include C'tan, Pariahs, Scarab Swarms, Monoliths and Tomb Spiders towards the number of destroyed models or the total original size of the army.

Squad may deploy using Infiltrators special rule

May deploy anywhere on the table. Place the center of an Ordnance blast marker at the unit's destination and roll a Scatter Die and 2D6. On a "hit", the unit lands on-target. On an arrow, they land off-target 2D6 inches of the direction shown. Units may not move or assault in the same turn they arrive in.

Roll an extra D6 when moving through difficult terrain. 

Cannot be used by: Bikes, Steeds, Daemonic Stature, Mark of Khorne, or Terminator Armor

Units in close combat with this unit must take a Leadership test at the start of each round of combat. If they fail then for that round they may only hit this unit on a roll of 6 regardless of WS. Models that either need not take model tests or which are assumed to automatically pass them are unaffected by this rule.