Grenades 30 is a special ability. Instead of making its normal attack or attacks, the characters with the Grenades 30 special ability can target an enemy up to 6 squares away. The targeting follows all the usual rules for targeting. The target and all characters adjactent to it (enemies and allies alike) take 30 points of Damage. The damage can be avoided by each character with a save of 11. Using this special ability is not an attack and does not require an attack roll. You cannot target an empty square with grenades.