Dragsaver, Esras (G-BT09/014EN) [Divine Dragon Caper]

[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](Drop Zone) Generation Break 1 Ritual 3 (Active if there are three or more grade 1 cards in your drop zone) : [Choose one of your rear-guards, and retire it & Choose one other card named "Dragsaver, Esras" from your drop zone, and put it on the bottom of your deck] Return this card to your hand.