When a Level 10 monster with ? ATK is Normal Summoned to your field, each player can draw until they have 6 cards in their hand. Once per turn, during your Main Phase, you can activate 1 of these Skills:
• Reveal 1 "Slifer the Sky Dragon" in your hand, place it on the bottom of the Deck, then draw 1 card.
• Once per Duel, discard 1 card, then add 1 "Slifer the Sky Dragon" from your Deck to your hand.