Aldavin's Curiosity

When Aldavin's Curiosity enters the battlefield, reveal the top three cards of your library and put an instant, sorcery, or creature card from among them into your hand and the rest into your graveyard.
Sacrifice Aldavin's Curiosity: The next instant, sorcery, or creature you cast and all cards with
the same name as that card costs {1} less to cast this turn.