Morphing Jar #2 (DB1-EN092) - Dark Beginning 1 Unlimited

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