how many cards in booster box pack (TCG) including ultra Best Pokemon cards packs to

It was only available inside random booster packs of the XY#3 Rising Fist series that was released in June, 2014

NO TURNING BACK: Locations have no unrevealed side, and story cards propel your plotlines to their climax

It's like a power boost for your Pokmon

Each booster box of this set is now called an "Enhanced Booster Box" and includes a copy of an N's Reshiram promo with a Journey Together stamp

Obvious contenders are Snapcaster Mage and the like - creatures that accrue their value when entering the battlefield or in response to an opponent's attempt at a maneuver, and can then be used to counter a new threat later