Topdeck Matters

Cards that turn the top of your library into a usable resource, revealing it and granting permission to play lands or cast spells directly from there. Courser of Kruphix and Oracle of Mul Daya reveal the top card and let you play lands from it; Future Sight and Melek, Izzet Paragon let you cast spells off the top; Bolas's Citadel lets you peek and play from the top paying life. These reward decks built to know and exploit what sits on top. Note that merely looking at or rearranging the top of your library is not enough here; the payoff is actually playing or casting cards from that hidden top slot.