Schema Thief

Mana cost: {3}{U}
Type: Creature — Vedalken Rogue Artificer
Power / toughness: 3 / 3
Set: March of the Machine Commander #24 (rare)
Price: $0.38 USD

Flying
Whenever this creature deals combat damage to a player, create a token that's a copy of target artifact that player controls.

Schema Thief has 2 printings, first in March of the Machine Commander (2023). EDHREC ranks it #11,040 among Commander cards. It appears most in Gimbal, Gremlin Prodigy decks (2,046 on EDHREC). 1 public deck on TCG runs it. It has 5 official rulings.

Legality

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

Public decks that run Schema Thief

Tinker Time - March of the Machine Commander, led by Gimbal, Gremlin Prodigy

Commanders that run Schema Thief most

Deck counts from EDHREC.

Often played with Schema Thief

Cards that show up in the same decks on EDHREC.

Rulings

2023-04-14: If the copied artifact is copying something else, then the token enters the battlefield as whatever that artifact copied.
2023-04-14: If the copied artifact is a token, the token that’s created copies the original characteristics of that token as stated by the effect that created that token.
2023-04-14: Any enters-the-battlefield abilities of the copied artifact will trigger when the token enters the battlefield. Any “as [this artifact] enters the battlefield” or “[this artifact] enters the battlefield with” abilities of the copied artifact will also work.
2023-04-14: Each of the tokens copy exactly what was printed on the original artifact and nothing else (unless that artifact is copying something else or is a token; see below). It doesn’t copy whether that artifact is tapped or untapped, whether it has any counters on it or Auras and Equipment attached to it, or any non-copy effects that have changed its power, toughness, types, color, and so on.
2023-04-14: If the copied artifact has {X} in its mana cost, X is 0.