explorer:
  type: world
  debug: false
  events:
    on player enters biome:
    - if <player.flag[explorer].as_list.contains[<player.location.biome.formatted>].not||true> {
      - flag <player> explorer:->:<player.location.biome.formatted>
      - wait 2t
      - announce "<&6>Hermes<&f>: Let it be known that, <player.name>, has found <player.location.biome.formatted> for the first time."
      }