Backups are a new card type that represents another combatant aiding you in battle. In Attack on Titan: Battle for Humanity, there are two ways to use Backups. Cards whose front side is a Backup can be played like any other card type, and at the end of the turn they are built to yourstage. Some Attack cards transform into Backups, so play them in your Card Pool as an Attack, then they are built into your Stage transformed at the end of the turn.
Like other card types, Backups have abilities you can use once the Backup is in your stage; but, like Assets, you cannot commit Backups to increase your check to play a card.
1. Backups have their own unique statistic: Stamina!
Stamina is to a backup as health is to a character. Once a backup loses all of its stamina,it is destroyed and placed in the discard pile.
When someone plays an attack against a rival with one or more Backups in their stage, the attacking player can choose whether to attack their rival’s Character or a Backup. The attack will still go through its normal attack sequence with one difference: the defending player cannot block an attack directed at one of their Backups.