Mu You pulled out this card from the miscellaneous items in the cargo container.
The card was covered with a layer of special material, similar to lamination, which kept the energy inside almost unharmed, thus preserving it intact.
As for the card itself, it was just an ordinary 'Lightning Ball Technique.'
Of course, the only ones capable of making and using Magic Cards were Sorcerers, so this card could only have been left by either Taurus or Gemini.
As to who exactly it was, a test would tell.
Mu You took out a tarot deck from his ring, spread his hand, and all the cards suddenly levitated together, swiftly circling in front of him, end to end, forming a circular Formation.
The Magic Card in Mu You's hands was then placed at the center of the circular Array, also floating automatically like the other cards.
Moments later, three consecutive cards disengaged from the deck, converging in the center of the Formation, overlapping each other and rapidly spinning.
