WorldBorderPlus

world :

  enabled : true
  bypass : true
  outside:
    messages :
     - "&cYou entered to the &ldanger&r&c zone!"
    commands :
     - "thor %player%"
      - "effect give %player% minecraft:blindness 99999 2"
      - "effect give %player% minecraft:wither 99999 1"
  inside:
    messages :
     - "&aYou entered to the &lsafe&r&a zone."
    commands :
     - "effect clear %player% minecraft:blindness"
      - "effect clear %player% minecraft:wither"