royal blood booster box card list One Piece (OP-10): Pack What’s more One Piece - Royal Blood

If it becomes night, the only mechanical changes that take place as the Stowaway becomes the Seafaring Werewolf are that the creature's power increases by one and its color changes to green

C Common Emergeroid Call X TRAP Counter When a Spell/Trap Card, or monster effect, is activated while you control a "roid" Fusion Monster: Negate the activation, then send all cards with the same name as that card from the activating player's Deck and Extra Deck to the GY

That player sacrifices all permanents in the pile of their choice.

Language Note: Card text may not be in English

It was also fairly easy to teach my child who now has a deck built from my sample cards