Hyperphasing
At the end of your opponent's turn, remove a limited number of your unengaged Necrons units and place them into Strategic Reserves to redeploy later. The Faction Pack set that limit by battle size: up to 1 unit at Incursion, 2 at Strike Force and 3 at Onslaught. The detachment has the HYPERCRYPT tag and cannot be taken alongside another HYPERCRYPT detachment.