FLIP: Shuffle all monsters on the field into the Deck. Then, each player excavates cards from the top of their Deck, until they excavate the same number of monsters they shuffled into their Main Deck. Special Summon all excavated Level 4 or lower monsters in face-down Defense Position, also send the remaining cards to the Graveyard.
FLIP: Return all Monster Cards on the field to their respective Decks and shuffle them. You and your opponent then pick up cards until you both have the same number of Monster Cards that were returned to each Deck. Special Summon the Level 4 or lower monsters to the field in face-down Defense Position. The rest of the cards picked up are discarded to the Graveyard.