The following apply to all models in a Necron army:
Necrons have several means of teleporting; many models can Deep Strike, a Monolith can bring models to itself, a Necron Lord with a Veil of Darkness can transport a unit, and so on. Under no circumstances can any unit or model make more than one teleport move in a single turn. Examples include using the veil of darkness to move a squad to within 18" of a Monolith, which then phases them to its portal, or deep striking a unit of Flayed Ones onto the battlefield and then moving them with the veil. There are no exceptions to this, no matter how clever your logic.