Reserves: Choose one: Your opponent discard a card from his or her hand. Or: You may look at the top card of your opponent's deck. You may discard that card.
Keywords
Reserves
Reserves: [Ability]: A layered, static ability that means, "The following ability works while, and only while, it's in the build zone." The granted ability remains to be the ability of its type. (For example, activated abilities granted by Reserves may be disrupted.)