Duplicant

Mana cost: {6}
Type: Artifact Creature — Shapeshifter
Power / toughness: 2 / 4
Set: Commander Masters #946 (rare)
Price: $0.31 USD

Imprint — When this creature enters, you may exile target nontoken creature.
As long as a card exiled with this creature is a creature card, this creature has the power, toughness, and creature types of the last creature card exiled with it. It's still a Shapeshifter.

Duplicant has 15 printings, first in Mirrodin (2003). EDHREC ranks it #2,904 among Commander cards. It appears most in Saheeli, Radiant Creator decks (3,033 on EDHREC). 6 public decks on TCG run it. It has 4 official rulings.

Legality

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

Public decks that run Duplicant

Eldrazi Unbound - Commander Masters, led by Zhulodok, Void Gorger
Exquisite Invention - Commander 2018, led by Saheeli, the Gifted
Growing Threat - March of the Machine Commander, led by Brimaz, Blight of Oreskos
Keen Engineering - Foundations Commander, led by Sai, Master Thopterist
Living Energy - Aetherdrift Commander, led by Saheeli, Radiant Creator
Lorehold Legacies - Commander 2021, led by Osgir, the Reconstructor

Commanders that run Duplicant most

Deck counts from EDHREC.

Often played with Duplicant

Cards that show up in the same decks on EDHREC.

Rulings

2020-08-07: Duplicant's base power and toughness change to the imprinted card's power and toughness. Counters and other effects that modify Duplicant's power and toughness still apply.
2020-08-07: If a melded permanent or a merged permanent is exiled by Duplicant's triggered ability, that ability's controller chooses the relative timestamp of the exiled cards. Duplicant looks at the information of the one with the latest timestamp.
2020-08-07: Abilities that define a * in a creature's power and toughness apply while that card is in exile, but abilities that add or subtract power and toughness don't. For example, the ability of Crusader of Odric applies to determine Duplicant's power and toughness, but the ability of Death's Shadow doesn't.
2020-08-07: Duplicant's power and toughness are constantly updated if the exiled card's power and/or toughness change.