Chronometron

Equip {u/b}
Chronometron can only be equipped to
creatures with the subtype "Necron Lord"
Equipped creature has "Creatures your
opponents control enter the battlefield tapped"
and "{w/u}{w/u}{w/u}: Target creature does not untap in
its controllers untap step"
"I am not your jailer, my wonderful relic of mortal
pride; you are your own prisoners! The look on your
faces is my favourite part - and I have enjoyed it a thousand times already." -Trazyn, the Infinite