Reserves: Choose one: Draw a card. Play only during your build step. Or: Choose one of your Transports. This turn, whenever the chosen Transport is attacked, you may add 1 counter to your Resource.
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.)