Bukkit

Explosion:
  size: 4 # The size of the explosion, values above 5 are not recommend, and 4 is TNT sized.
  duration: 10 # The duration in minutes, that the effect lasts. Minimum: 1 minute.
  item: 289 # The item that has to be consumed to enable the effect. Please note: I am not responsible for any problems due to using a different item.
  allow-explosion-on-suicide: true # When set to false it will stop explosions occurring if a player uses /kill as this can be potentially damaging.
  no-damage: false # When set to true the explosion does no damage to players/landscape, simply enables the effect.