Once per turn: You can Tribute 1 Fish, Sea Serpent, or Aqua-Type monster; this card gains 600 ATK. If this card attacks a Defense Position monster, inflict piercing Battle Damage to your opponent.
Water Hazard can be used to special summon another water monster so that it can be used as a tribute for piercing moray. Good fish monsters to use are Deepsea Macrotrema or Needle Sunfish.
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