Ultron Prime

Flying, first strike
Ultron Prime cannot be cast from any zone.
Metalcraft —Ultron Prime has vigilance as long as
you control three or more artifacts.
{c}, {t}: Create a 1/1 colorless Ultron Sentry
artifact creature token with flying.
{p/c}: Transform Ultron Prime. Activate this
ability only if you control five or more artifacts.
({p/c} can be paid with either {c} or 2 life.)