Necron Monolith

Necron Monolith

Artifact - Vehicle | Power/Toughness: 7 / 7 (CMC 7)
Flying, indestructible
Eternity Gate -- Whenever Necron Monolith attacks, mill three cards. For each creature card milled this way, create a 2/2 black Necron Warrior artifact creature token.
Crew 4 (Tap any number of creatures you control with total power 4 or more: This Vehicle becomes an artifact creature until end of turn.)