This card could be useful if you plan on summoning next turn Shark Caesar with 5 materials, however, you will have to protect him long enough for him to detach all 5 materials to be invincible in battle.
As this card is a Quick-Play Spell Card, activate it during your opponent's turn to overcome its drawbacks.
Summon "Mermaid Archer" with this card and then equip it with another one of the monsters summoned by this card's effect.
"Mermaid Archer" is also a Sea Serpent-type monster, making it also a prime target for this card.
If this card is combined with "Lemuria, the Forgotten City" you can raise the level of the summoned monsters dramatically. First use this card during your opponent's End Phase, then on your turn, you can raise your monsters levels with "Lemuria, the Forgotten City", allowing you to Xyz Summon high-rank monsters more easily.