Obelisk of Undoing

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  Everflowing Chalice

  $0.45

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  Urza's Tower (Forest)

  $0.97

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  Urza's Mine (Pulley)

  $0.83

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  Hedron Archive

  $0.43

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  Thran Dynamo (Retro Frame)

  $4.45

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  Urza's Power Plant (Sphere)

  $0.96

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  Decoction Module

  $0.32

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  Shrine of the Forsaken Gods

  $0.52

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Suggestions from EDHREC, narrowed to what is on our shelf.