Royal Keeper is a Common Effect Monster card from Yu-Gi-Oh! (Dark Beginning 2, DB2). Current market price: $0.13.
Common
Dark Beginning 2 (DB2)
Card Text
Once per turn, you can flip this card into face-down Defense Position. When this card is flipped face-up, it gains 300 ATK and DEF until the end of the turn. (If attacked, this effect resolves after damage calculation.)
