habitica/website/common/script/content/constants/animalSetAchievements.js

const ANIMAL_SET_ACHIEVEMENTS = {
  legendaryBestiary: {
    type: 'pet',
    species: [
      'Dragon',
      'FlyingPig',
      'Gryphon',
      'SeaSerpent',
      'Unicorn',
    ],
    achievementKey: 'legendaryBestiary',
    notificationType: 'ACHIEVEMENT_LEGENDARY_BESTIARY',
  },
};

export default ANIMAL_SET_ACHIEVEMENTS;