The back or "night" side had the moon symbol and a slightly altered frame similar to planeshifted cards with a darker text box and white text for the card type, name, and (for creatures) power and toughness
A foil version of the limited edition Secret Lair Drop Series from Secret Lair x SpongeBob SquarePants: Lands Under the Sea
You get protection from roughly 40% of creatures when you equip it, which is pretty good
They can surprise an opponent for that last point of damage that you need for the win or help facilitate decks that like to see creatures enter the battlefield to trigger other effects
Example: Bennie Bracks, Zoologist is great as a card draw, but you need to create a token to do so, and not every deck creates tokens consistently
Since Commander's a singleton format to begin with (with exceptions like basics, Rat Colony, Shadowborn Apostle, and others), you can return all the permanents in your graveyard to the battlefield with this sorcery during the late game to finalize your win