機(き)械(かい)医(い)学(がく)的(てき)召(しょう)喚(かん)

Whenever you cast an instant or sorcery spell, create an X/X colorless Construct artifact creature token, where X is that spell's converted mana cost.

, Exile Metallurgic Summonings: Return all instant and sorcery cards from your graveyard to your hand. Activate this ability only if you control six or more artifacts.