pokemon sword and shield chilling reign booster box | | Pokemon TCG including powerful new Pokémon V Pokémon TCG: Sword & Shield—Chilling

Thus, those cards don't replace existing card slots but add more cards to the set

Signal Warrior X LIGHT Level 7 [ WarriorSynchroEffect ] ATK 2400 DEF 1000 1 Tuner + 1+ non-Tuner monsters Once per turn, during the Standby Phase: Place 1 Signal Counter on each face-up card in the Field Zone, also place 1 on this card

During its first summon (fusion), this card can gain the effects of its fusion materials, preferably Helios and Selene due to their "cannot be destroyed or targeted by card effects" combo

As for showing you the statistic of the player you are going to match with - this actually is not good

It might reduce the number of friends you have, but you cant deny its a great combo

If you can play more, aim to win at least 4-15 games per day to maximize your gold and experience gain from wins