[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. [AUTO] Generation Break 1 Unite (This ability is active if you have called two or more units to (RC) or (GC) during this turn) : [Choose one of your other rear-guards, and put it on the bottom of your deck] When this unit is placed on (RC) from your deck, you may pay the cost. If you do, at the end of that turn, return this unit to your hand.