Act 29 - Infinity 3, Two New Soldiers (manga)
To perform the attack, she would lift her arms above her head and bring them down, sending a ball of blue energy shaped like the planet Neptune towards her enemies. It was possible that water was also a component of this attack, as Eudial's Daimon Chokkoka and her animated sand statues were melted by this attack in episode 107 of the anime.
Sailor Neptune creates water energy, that travels down and toward the opponent.
- The attack was renamed "Neptune Deep Submerge" in the English dub