Attacking

When a card attacks, add friendly influence equal to that card's power to each hex within that card's range.

When influence is placed onto a hex that already has enemy influence on it, the influence cancels each other out. For example, if Player A places 3 influence onto Player B's hex that has 1 influence on it, the hex will end up with 2 influence on it, friendly to Player A.

Card Destruction via Influence

A face-up card on a hex friendly to it will be destroyed when its hex becomes neutral or becomes controlled by an enemy player.