Better cards than Secrets of the Key

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Secrets of the Key — Instant · U

Investigate. If this spell was cast from a graveyard, investigate twice instead. (Create a Clue token. It's an artifact with "{2}, Sacrifice this token: Draw a card.")
Flashback {3}{U}

No upgrades have been published for Secrets of the Key yet — neither the algorithm nor the community has found one.

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