Special Keyword Abilities

Aggressive - When this Figure is put into a stack, begin a battle with this Figure as an Attacker.

Raider X - While this Figure is an Attacker, it is Power +X.

Protector X - While this Figure is a Defender, it is Power +X.

Bound : Requirement -
When this [card] is put into a stack, choose a [Requirement]. If the [Requirement] leaves play or if you could not choose a [Requirement] when this [card] came into play, discard this [card] from your stack.

To summarize, when a card with Bound is played, you must choose a card that matches the description of the requirement or else the card with Bound is discarded from your stack as soon as it is played there. If a card can be chosen, then that card is now referred to as the "Bound card" and this card (with Bound) is considered Bound to it. If the "Bound card" leaves play (so that it is not in a player's stack), then this card (with Bound) is discarded from your stack.

Hunter - While this Figure is the only Attacker, you choose which Figures are Defenders.

Unless another card effect is used, you choose which Figures the Defending Player must defend with. If an effect allows more than one Figure to be a Defender, unless otherwise defined, the Defending Player chooses the number of Figures that are Defenders and you choose which Figures are Defending.