Seawall Banshee

:Sentinel :Hollow :[Choose a card from your hand, and discard it] When this unit is placed on from your hand, you may pay the cost. If you do, choose one of your units that is being attacked, and it cannot be hit until end of that battle. :[ 1 & Choose a card from your hand, discard it, choose another "Seawall Banshee" from your drop zone, and put it on the bottom of your deck］ When this hollowed unit is retired, if you have a vanguard with "Nightrose" in its card name, you may pay the cost. If you do, return this card to your hand.