Karn, Silver Golem and Duplicant interactions

[Hyperion]

Karn, Silver Golem

Artifact Creature -- Golem Legend
4/4
Whenever Karn, Silver Golem blocks or becomes blocked, it gets -4/+4 until end of turn.
: Target noncreature artifact becomes an artifact creature with power and toughness each equal to its converted mana cost until end of turn. (That artifact retains its abilities.)

Duplicant

Artifact Creature -- Shapeshifter
2/4
Imprint -- When Duplicant comes into play, you may remove target nontoken creature from the game. (The removed card is imprinted on this artifact.)
As long as a creature card is imprinted on Duplicant, Duplicant has that card's power, toughness, and creature types. It's still a Shapeshifter.

What happens if Player A animates an artifact Player B controls (say, a Gilded Lotus) with Karn's ability, then Imprints the Gilded Lotus on Duplicant?

Does Duplicant become a 5/5 until end of turn, and then reverts to a 2/4 when the Gilded Lotus is no longer a creature? Or does something else happen?

[goober]

As soon as the Lotus leaves play it "forgets" it was a creature, and the Duplicant becomes 2/4.  The imprint says the card's p/t, which doesn't exist.  As well as mandating that it is still a creature.  Anything that is RFG is only what the card says it is, and Humilty, Karn, or anything else won't affect it.

[rvs]

goober is correct. The reasoning is even more simple than he makes it out to be. If a non-creature is imprinted on Duplicant, it simply doesn't change anything about Duplican't p/t, since it specifically requires a creature card to be imprinted on it for effects (it's a wording update that came out recently).

[Jebus]

goober is correct. The reasoning is even more simple than he makes it out to be. If a non-creature is imprinted on Duplicant, it simply doesn't change anything about Duplican't p/t, since it specifically requires a creature card to be imprinted on it for effects (it's a wording update that came out recently).

Actually, that has nothing to do with the update.  The requirement that it only works with creature cards has always been there.

The eratta addressed the issue of multiple creature cards on Duplicant.

Another note:

If it didn't specify that it had to be a creature card, it would end up as a 0/0.