Copy Artifact on Isochron Scepter

[Trofast]

My opponent cast Copy Artifact on my Isochron Scepter which got a Mana Drain imprinted on it.

Will my opponent choose a new card from his hand and imprint on the Scepter og does Mana Drain stick on it?

[Limbo]

When the copy artifact comes into play, it already considers itself a copy of the artifact. It does not know what was imprinted on the original, just that is an isochron scepter. So it will have the same triggers as the original, so when the copy artifact comes into play, you can choose your own instant with CMC (2) or less to imprint.