Battle Spirits Wiki

Mystery Seal (謎封印 ; Nazo fuuin) is a keyword introduced in SD47. Currently, only Medjeowl possesses this keyword. The effect is worded as follows:

  • Mystery Seal - (When Summoned) You can exchange one of your Life cores for Soul Core on your Reserve.

Mystery Seal is an alternative and weakened method to send Soul Core to Life. However, in exchange, the Spirit possessing it also has a relatively low cost, which allows sealing in early game.

See also:

List of Spirits with Mystery Seal

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