Vorheas, Weapons Smith

Metalcraft — As long as you control three or more artifacts, Vorheas Weapons Smith gets +2/+2 and "{x}{w}{w}: Equip all equipment you control with converted mana cost of X or less to Vorheas, Weapons Smith."
When Vorheas enters the battlefield, you may put an equipment with converted mana cost of 3, from your hand onto the battlefield.