* The "[[Shien's Castle of Mist]]" appears in this card's background.* In keeping with the general theme of the "[[Six Samurai]]", the "spy" on the card is disguised as a Feudal Japanese peasant. Traveling peasants and merchants were often used during Japan's Feudal period by warlords to check on opposing factions' territories by crossing into them before returning (, just as this card's effect has a monster only temporarily "joining" the opposing side).* A couple of cards have also been released with the name of This card is not actually a "[[Shien]]" card,as "Shien" both resembling Feudal is written in kana rather than kanji in its Japanese warlords, so even though this card has no ''gameplay'' relation to them, it certainly shares a ''thematic'' relationname.