Metallurgic Summonings [Commander 2021]

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 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.