For this card alone, the current market value is an estimated $10,000, which is an amazing price to behold, but probably worth it for something so unique
If you also control a nontoken Baron Bertram Graywater, that one's ability will also trigger, netting you another Vampire Rogue
Of course, that doesn't mean to say that the price won't still fluctuate wildly, but it is likely that Sulley & Boo could continue to be a top contender for most valuable in the set
Many have discussed the different toolboxes or combos she will enable, (Intruder AlarmIntruder Alarm has recently spiked in price for precisely this reason) but I think it's important to discuss how she'll be seen politically

THE FIRST STEPS AFTER THE LAST STANDRebuild the Multiverse while building up your collection in this epic conclusion to the March of the Machine storyline INTRODUCING EPILOGUE BOOSTERSThese special boosters fill in the story between sets with 5 Magic: The Gathering cards in each pack RARES & UNCOMMONS ONLYSmall but mighty, all 5 cards in each booster are of rarity Uncommon or higher, including 13 cards of rarity Rare or higher FOILS & SHOWCASE CARDSEach Epilogue Booster contains 1 Showcase or Retro-Frame card and at least 1 Traditional Foil card CONTENTS1 Epilogue Booster Box containing 24 March of the Machine: The Aftermath MTG Epilogue Boosters Exceptions: Older Magic Sets Arabian Nights, Antiquities, Fallen Empires, The Dark, Homelands From 1993 to 1995 we got five sets that had booster boxes with 60 packs of eight cards each
You are a bad Commander)