Talk:The Watcher in the Sky/@comment-11176760-20151113212050/@comment-25858944-20151114115406

When people attacks you, your defend team will be used automatically.

DEF is for the card to defend against and attack and the ATK is for your defense to kill those who attacks you. You can try to hit other people and see it. To put it simple,more attack means can deal more damage and more defense means takes lesser damage.

You can read Deck Guides for more informations.