9. When a card ability allows a player to gain a certain number of attack or defense dice "this round" (for example, Scotty), how does this work?
For attack dice, this allows the player to add that many attack dice (in total) to his attack rolls during that round's Combat Phase. If a player is able to make multiple attacks during the same Combat Phase, the player may choose when to add the bonus attack dice. These dice can even be added to Secondary Weapon attacks.
For defense dice, this allows the player to add that many defense dice (in total) to his defense rolls during that round's Combat Phase. If the player is attacked multiple times during the same Combat Phase, the player can choose when to add the bonus defense dice.
Note that this type of text is different from a continuous bonus which does not use the phrase "this round" (for example, the text on Donatra or Terrell). A continuous bonus applies to all attack and defense rolls made by the affected ships during that round.
The FAQ states that you get +2 attack dice to use durring your attacks that round. You may split them (+2 on one attack, +1 on a attack & +1 another attack) however you want.