When an opponent's monster declares an attack: You can banish this card from your Graveyard, then target 1 Spell Card in your Graveyard; send the top card of your Deck to the Graveyard, and if you do, return the target to the bottom of your Deck.
Can return 1 Spell card from your Graveyard to your bottom Deck.
Needs to be in your Graveyard to activate its effect.
Its best to recycle limited edition cards from your Graveyard, therefore using Creator skill from Pegasus is a good idea, since it lets you draw 1 powerful card that is outside of your Deck (often limited/banned in TCG cards).
Creator (skill) Can be used if your Life Points drop below 2000. In the Draw Phase, instead of doing a normal draw, a powerful card, from outside of your Deck, is added to your hand. This skill can only be used once per Duel.