<Katana World> :Sentinel (You may only have up to four cards with ":Sentinel" in a deck) Play this with [discard a card from hand]! Choose one of your units, and it cannot be hit until end of that battle. Choose a <Ninja> without sentinel from your drop, and put it into hand. Remove this card.
:Sentinel (You may only have up to four cards with "
[discard a card from hand]!