booster box scarlet and violet 151 - Pack and Squirtle Scarlet & Violet 151 Booster

1 is an item listed by GALAXY

SE Secret Rare Penguin Knight X WATER Level 3 [ AquaEffect ] ATK 900 DEF 800 When this card is sent directly from your Deck to the Graveyard by an effect of a card controlled by your opponent, unite your Graveyard cards and your own Deck, shuffle them and form a new Deck

If this causes the total toughness of creatures you control to change (perhaps because you control a creature whose toughness is determined by the number of cards in your hand), that new toughness will be used to determine the cost reduction

But Commander made its bones as the dollar rare format

You can get a vague idea of the types of cards in each pack by the stats shown on the pack preview screen, though vague is key here

Notably, older cards such as Moonmist that instruct a player to transform permanents won't affect permanents with daybound or nightbound