Content is now organized by game version and source

This link potentially matches multiple versions of "Mastiff":

• Mastiff (System Reference Document 5.2)

  CR 1/8 · Beast (Medium)

• Mastiff (Monstrous Menagerie)

  CR 1/8 · Beast (Medium)

• Mastiff (System Reference Document 5.1)

  CR 1/8 · Beast (Medium)

• Mastiff (Black Flag SRD)

  CR 1/8 · Beast (Medium)