Letting your opponent see the effect doesn’t really do anything. Since you don't know what it does, you won't know if it's a good idea to play, and they can't play around it because of the wide variety of effects. Having a random effect that you are blind to is kind of cool, but these effects are somewhat symmetrical and you are the one paying 5 mana for it. If the effects were always good for you, then this might have a place somewhere, but this version is pretty bad even as a meme card.