Cards are disposable Mana storage tools, inscribed with a magic array and charged with Mana, which works similar to a simple cartridge, and does not require combustion within a Device. It is believed that each card is charged using the owner's Mana over a long period of time, and then saved in this form.[1]

References[edit | edit source]

  1. ^ Magical Girl Lyrical Nanoha A's DVD 4 Booklet (translation).
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