RD/KP04-JP043 地層調査 Chisou Chousa (Geological Survey/Strata Survey)
Normal Spell Card
[Requirement] None
[Effect] Excavate cards from the top of your Deck equal to [The number of cards your opponent controls] and reveal them to both players. Then, place all of those excavated cards on either the top OR bottom of your Deck in any order you desire.

Note: All the cards have to go on top of the Deck or the bottom of the Deck. No mixing.

Source