Dynastic War

Choose a necron You control. That necron
becomes "Honoured" (replace it with a 4/4 black token creature named "Lord", subtype necron, with
first strike). If the "honoured" necron does not destroy it's enemy creature in it's next combat, it
is no longer Honoured and is replaced with it's original card. However, you may sacrifice a card
to keep the necron Honoured. When the
"Honoured" creature dies or becomes
dishonoured, put this card in your graveyard.