1 Tuner + 1+ non-Tuner WATER monsters
Each time another monster(s) you control is destroyed by battle with an opponent's attacking monster, or by an opponent's card effect: Inflict 600 damage to your opponent. During the Battle Phase, when your opponent activates a card or effect, while you control another monster (Quick Effect): You can negate that effect, and if you do, destroy that card. You can only use this effect of "Glacial Beast Iceberg Narwhal" once per turn.
