[
  {
    "type": "monstergroup",
    "name": "GROUP_MOSSY_BOOMER_UPGRADE",
    "default": "mon_boomer_moss",
    "//": "Upgrades for the Thorny Boomer.",
    "monsters": [
      { "monster": "mon_boomer_moss" },
      { "monster": "mon_boomer_sap", "weight": 250 },
      { "monster": "mon_boomer_pollen", "weight": 250 }
    ]
  },
  {
    "type": "monstergroup",
    "name": "GROUP_GARDEN_ZOMBIE_UPGRADE",
    "default": "mon_zombie_garden",
    "//": "Upgrades for the Thorny Shambler.",
    "monsters": [
      { "monster": "mon_zombie_garden" },
      { "monster": "mon_brute_thorns", "weight": 15 },
      { "monster": "mon_swimmer_swamped", "weight": 30 },
      { "monster": "mon_shrieker_vines", "weight": 15 },
      { "monster": "mon_boomer_moss", "weight": 30 }
    ]
  }
]
