Here are some tricks to identify rebacked cards : Watch out for the alignment of the mana cost inside the grey circle (for example, on Mox Sapphire and Black Lotus) Weight Test: Normally, a Beta card should weigh around 1.72g and 1.74g
But personally in my games because of the ammount of islands in the deck ther's usually at least one U available and there are a ton of cards that can work off of that such as Hidden Strings or the ever powerfull Frantic Search
Five damage to any creature is enough to kill most decent-sized creatures, and its difficult to block or attack into
It's up to The Pokemon Company to ensure the supply of this product will meet what is certainly going to be an extremely high demand so that scalpers can't so easily take advantage of this release
For collectors focused on liquidity and maximizing value, sticking with the established hierarchy is the most reliable strategy
It also keeps your opponent guessing as to your plans, or allows you to shift (pun intended) your plans on the fly to deal with your opponents current position