[REQUIREMENT] If there are 10 or more cards in your Deck.
[EFFECT] Excavate the top 4 cards of your Deck and reveal them to your opponent. Send all DARK Spellcaster monsters and Spell Cards among them to the GY, then, shuffle the remaining cards into the Deck, also, if you sent 4 cards to the GY with this effect, you draw 1 card.