Harbor Serpent

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  Counterspell (Borderless)

  $2.71

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  Whelming Wave

  $1.02

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  Tromokratis

  $0.40

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  Hullbreaker Horror

  $6.93

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  Negate

  $0.32

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  Colossal Whale

  $0.38

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  Spawning Kraken

  $14.87

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  High Tide (Weber)

  $2.01

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