Metallurgic Summonings
{3}{U}{U}
Enchantment
Whenever you cast an instant or sorcery spell, create an X/X colorless Construct artifact creature token, where X is that spell's mana value.
{3}{U}{U}, Exile ~this~: Return all instant and sorcery cards from your graveyard to your hand. Activate only if you control six or more artifacts.