For the standard, the first thing I notice is Kyogres mouth
It reads: "[Winter Stockpile] Whenever one of your characters is banished, you may put that card from your discard into your inkwell facedown and exerted." Sitting at around $145.48 on TCGplayer right now, I can only seeing it going up in value over the next few months
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Potential Interaction Another thing to consider is the not-so-different I want card A to deal with my opponents card B. If thats the case, put that card in your sideboard
=_=" [spoiler=Monsters] [spoiler=Cinderella from the Untold Fairy Tales] [spoiler=Effect] When this card is Summoned, you can Special Summon 1 "Pumpkin Carriage from the Untold Fairy Tales" from your hand, Deck, or Graveyard
Rin and Seri, Inseparable goes nuts with token generators like Release the Dogs, while Be'lakor, the Dark Master simply triggers more often if you can generate more demons from a single card like Great Unclean One or Demonic Covenant