Effect
Once per turn: You can reduce the Level of this card by 1, and if you do, Special Summon 1 Level 3 or lower WATER monster from your hand.
The monster effect of "Hammer Shark" is an Ignition Effect.
It does not target.
The effect of "reduce this card's Level by 1" and the effect of "Special Summon 1 Level 3 or lower WATER monster from your hand" are treated as occurring simultaneously.
The Level reduced by the effect of "reduce this card's Level by 1" remains applied as long as "Hammer Shark" remains face-up on the field.
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