Zuko the Imposter

As Zuko the Imposter comes into
play, you may choose a creature in play.
If you do, Zuko comes into play as a
copy of that creature, except its name
is still Zuko the Imposter, it's still
legendary, and it gains "{2}{u}{u}: Return
Zuko the Imposter to its owner's
hand at the end of turn."