Workshop Elders

Mana cost: {6}{U}
Type: Creature — Human Artificer
Power / toughness: 4 / 4
Set: March of the Machine Commander #245 (rare)
Price: $0.29 USD

Artifact creatures you control have flying.
At the beginning of combat on your turn, you may have target noncreature artifact you control become a 0/0 artifact creature. If you do, put four +1/+1 counters on it.

Workshop Elders has 3 printings, first in Throne of Eldraine (2019). EDHREC ranks it #15,311 among Commander cards. It appears most in Mishra, Eminent One decks (736 on EDHREC). 2 public decks on TCG run it. It has 3 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 Workshop Elders

Mishra's Burnished Banner - The Brothers' War Commander, led by Mishra, Eminent One
Tinker Time - March of the Machine Commander, led by Gimbal, Gremlin Prodigy

Commanders that run Workshop Elders most

Deck counts from EDHREC.

Often played with Workshop Elders

Cards that show up in the same decks on EDHREC.

Rulings

2019-10-04: If another effect later causes the artifact to become a creature and sets its power and toughness as it does so, that creature will have that base power and toughness; it won't be 0/0. Notably, crewing a Vehicle does not set its power and toughness, so a Vehicle's base power and toughness remain 0/0 if you crew it.
2019-10-04: The effect of Workshop Elders's triggered ability lasts indefinitely. It doesn't wear off during the cleanup step.
2019-10-04: An artifact that becomes a creature due to Workshop Elders can't attack unless you've controlled it continuously since your turn began.