The spoiler season for the Final Fantasy MTG set truly has no brakes
I would round out the broken list with Sol Ring, Library of Alexandria, Mana Vault, Mana Crypt, and Ancestral Recall
When your opponent plays a Tamer, you can use [BT13-031 MirageGaogamon] to return the Tamer to their hand, giving you major advantages in battle
Basically, it is done twice for each investigator, and when all investigators have completed their actions, the monster phase begins
C Common Night Assailant X DARK Level 3 [ FiendFlipEffect ] ATK 200 DEF 500 FLIP: Target 1 monster your opponent controls
With multiple grading companies in the market, choosing the right one can make all the difference in your cards resale potential