Hydro Storm, also known as Hydro Typhoon or Divine Storm, is a massive area attack that involves holy water raining down on the entire screen. Its accuracy is high because rain water can't be evaded easily and the duration of the spell is, in most cases, considerable.
It was first introduced as Richter Belmont's Item Crash with the Holy Water sub-weapon, as seen in Rondo of Blood, Dracula X, Symphony of the Night and The Dracula X Chronicles. It must be noted, though, that while most versions have Richter hover in midair, rendering him invincible while the storm is being unleashed, the Dracula X Chronicles version plays a little cutscene instead when the spell is cast and the player immediately regains control of Richter, who's still vulnerable to enemy attacks while the storm lasts.
Other characters are also able to perform this move. It could later be performed by Nathan Graves with the Holy Water sub-weapon when the Pluto + Salamander DSS combination is in effect. Juste Belmont can perform the move by combining Holy Water with the Wind Book. Divine Storm appears as a Dual Crush in Portrait of Ruin, which can be performed with Jonathan Morris and Charlotte Aulin together.
Dracula's third form in The Dracula X Chronicles mimics this attack, although this time raining blood and appropriately called Blood Storm.
Although the Hydro Storm doesn't appear in Super Smash Bros. Ultimate (not counting the Holy Water that acts as Richter's special attack), it's indirectly alluded to in Richter's gameplay portion of the debut trailer for both him and Simon, where he throws Holy Water onto the ground in the Pikmin stage during the raining portion and he gets swept away by the current while doing his fist pump taunt.
|Item Data: Hydro Storm|
|Image||Name - Game|
|Type / Users||Attributes / Consume||Statistics / Sell||Found||Notes|
|Spreads a sacred flame when cast to the floor, burning enemies. ()|| Sub-Weapon|
Alucard, Richter, Maria (Saturn only)
| Attrib: Holy / Fire|
Consume: 3 Hearts (Alucard); 1 (Richter / Maria)
| ATT +5|| Find: Containers, Enemy Drop|| Effect: Thrown in pillar (Alucard), Thrown in wave (Richter), Thrown in fast wave (Maria).|
Special: Item Crash (Hydro Storm, Richter only, 15 Hearts).
|'|| Spell Fusion|
| Attrib: Wind|
Consume: 50 MP
| Create: Holy Water + Wind Book|
|Create an intense rain of holy water.|| Dual Crush|
| Attrib: Holy|
Consume: 150 MP
| Find: Dark Academy ( )|| Effect: The duo will summon holy water to rain down on the screen and damage everything.|