Vesuvan Doppelganger [Arena League 1997 Summer Season 2nd Place]
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As Vesuvan Doppelganger comes into play, you may choose a creature in play. If you do, Vesuvan Doppelganger comes into play as a copy of that creature except for its color and gains "At the beginning of your upkeep, you may have this creature become a copy of target creature except for its color. If you do, this creature gains this ability."