Metallurgic Summonings

Mana cost: {3}{U}{U}
Type: Enchantment
Set: Kaladesh Remastered #57 (mythic)

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 enchantment: Return all instant and sorcery cards from your graveyard to your hand. Activate only if you control six or more artifacts.

Metallurgic Summonings has 4 printings, first in Kaladesh (2016). EDHREC ranks it #4,121 among Commander cards. It appears most in Hinata, Dawn-Crowned decks (3,355 on EDHREC). 1 public deck on TCG runs it. It has 4 official rulings.

Legality

commander: legal
legacy: legal
vintage: legal
pauper: not legal
modern: legal
pioneer: legal
standard: not legal
brawl: legal

Public decks that run Metallurgic Summonings

Prismari Performance - Commander 2021, led by Zaffai, Thunder Conductor

Commanders that run Metallurgic Summonings most

Deck counts from EDHREC.

Often played with Metallurgic Summonings

Cards that show up in the same decks on EDHREC.

Rulings

2016-09-20: Metallurgic Summonings's first ability resolves before the spell that caused it to trigger.
2016-09-20: For a spell with {X} in its mana cost, use the value chosen for X to determine its mana value. For example, Clash of Wills is an instant spell with mana cost {X}{U}. If you chose 2 as the value of X, then Clash of Wills has mana value 3, and Metallurgic Summonings's ability will create a 3/3 token.
2016-09-20: If Metallurgic Summonings's first ability resolves and the spell that caused it to trigger has been countered, use that spell's mana value as it last existed on the stack to determine the value of X.
2016-09-20: The number of artifacts you control is checked only as you activate Metallurgic Summonings's last ability. It's not checked again as it resolves.