Aspheros, God of Metal

Vigilance, Reach, Indestructible
Aspheros, God of Metal is not a creature unless
you control 8 or more artifacts.
Whenever an artifact enters the battlefield under
an opponents control you may tap an untapped
artifact you control and pay {4} to gain control of
that artifact.
Aspheros, God of Metal's power is equal to the
number of artifacts you control.