Magneto, Metallic Grasp

Hexproof
{1}, {t}: Search your library for an artifact card
and put it onto the battlefield. Then shuffle
your library.
{x}: Gain control of X target artifacts.
{x}: Tap or untap X target artifacts.
{x}: Sacrifice X target artifacts.
{x}: Destroy X target artifacts you control.
{x}: Exile X target artifacts you control.