Yawgmoth

Pay {x}{x}{x} Life: When Yawgmoth enters the battlefield, destroy {x} permanents. Then return any creatures destroyed this way to the battlefield under your control. They are now artifact creatures.
Yawgmoth's power and toughness are equal to 10 plus the number of artifacts you control. Yawgmoth has all landwalks.
All other artifact creatures gain +1/+1 and Fear.