[CONT]: Sentinel [AUTO]: [Choose a card from your hand, and discard it] When this unit is placed on (GC) from hand, you may pay the cost. If you do, choose up to one of your vanguards that is being attacked, and that unit cannot be hit until end of that battle. [ACT](Soul) Generation Break 1 Darkness (This ability is active if cards have been put into your soul during this turn) : [Choose one of your grade 1 or less rear-guards, and retire it] Put this card into your hand.