Instead, it uses the concept of modal double-faced cards introduced in Zendikar Rising
C Common Sword Arm of Dragon X EARTH Level 6 [ DinosaurNormal ] ATK 1750 DEF 2030 This Jurassic juggernaut has a spine covered in sword-like plates, and a tail to split open skulls
As to the original question, considering the above: I personally like custom cards, but only if done well
At carton level (12 boxes), you can expect about 2 total SA pulls with roughly a 50% chance of seeing the Giratina V SA specifically
Batterskulls living weapon ability has allowed it to serve as a finisher for control decks in Modern and Cube, and its also useful in equipment-focused Commander decks
If a Deck runs Number 39: Utopia , then its most common variants like Number 39: Utopia Double are also expected to be added