Dragsaver, Esras

:Sentinel :[Choose a card from your hand, and discard it] When this unit is placed on from hand, you may pay the cost. If you do, choose one of your vanguards that is being attacked, and that unit cannot be hit until end of that battle. (Drop zone)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 "Dragsaver, Esras" from your drop zone, and put it on the bottom of your deck] Return this card to your hand.