Card Trivia:Mirror Prison

"Mirror Prison":

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• "Giant Rat" and 2 "Lamb Tokens" appear on this card's artwork.
  • Maybe a "Lamb Token" is being tributed to allow "Giant Rat" to attack; Both are Beast-type monsters.

• The fact that this card's effect doesn't apply to Machines and Zombies maybe is possibly because they aren't "alive."
• But in that case it's not known why this effect isn't also applyed to Rock-Type monsters