While there are holo versions of the card, the non-holo cards have actually been valued higher due to the fact that they are a known error in manufacturing
For creatures with phases and steps, lets say I have Mystic Penitent and only six cards in my graveyard
This can take the form of reading or watching set reviews, or just by asking someone at your local game store what they think of the cards
For competitive play, Jack (OP08-084) is the most impactful card in the set
It is interesting, it has a lot of places that can put it to good use, it is powerful yet it isn't oppressive like some of the powerful cards of this style
Secret Identity for instance, features a heroic possum or rat from Bloomburrow wearing a mask to make themselves look like a racoon