Card Trivia:Ergosphere

"Ergosphere":

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• Appearances

• "Schwarzschild Limit Dragon" appears in this card's artwork.
  • This card's artwork depicts "Schwarzschild Limit Dragon" devouring its own tail in a manner resembling the ouroboros.

• This card is named after an ergosphere, the region around a black hole in which matter starts to be sucked in.
  • This is further reinforced by this card's effect supporting "Schwarzschild Limit Dragon", which is named after the Schwarzschild radius, another term related to a black hole.