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This link potentially matches multiple versions of "Giant Centipede":

• Giant Centipede (System Reference Document 5.2)

  CR 1/4 · Beast (Small)

• Giant Centipede (System Reference Document 5.1)

  CR 1/4 · Beast (Small)

• Giant Centipede (Monstrous Menagerie)

  CR 1/4 · Beast (Small)