Check this out, on one side you have a traditional art card, like we've seen in the past, with signatures (each from different cards that represent the given character), and on the other, something WOTC isn't ready to show us yet
I remember eagerly playing this Green creature in my decks when I was a brand new player in 1997
But why would you
Two notes with this one: First, it keeps the counters when it flips because its never exiled
A proxy/playtest card is a stand-in so you can test decks or play casual games without chasing expensive cardboard
Furthermore, that stat line led this Portal Three Kingdoms card to be a rare rather than a common, as it likely would be today (if it were even printed at all with such a vanilla ability), and explaining this cards over-$60 price point in the secondary market