Breakdown High Wave

Breakdown High Wave, also known as the "Boiling Tears of the Lazy Demon", is a High-tier Sacred Gear wielded by Kazan Hoshimiya from the student council, introduced in Volume 7 of Highschool DxD: Яe-birth. A support-type of Sacred Gear, it has the ability to create and manipulate hot spring water.

Summary
Breakdown High Wave was introduced in Volume 7, during the climax of the "Seven mysterious Wonders of Kuoh academy" Arc. Surrounded by angry amazons and unable to use his Boosted Gear, Ichijou was saved by his senior and vice-president of the student council Kazan Hoshimiya and his sacred gear, Breakdown High Wave, which created a wall of vapor around the area so they could they could unleash their full strength while also hiding their presence from the common view.

The Sacred Gear makes it's return in the "Devil/Vampire Peace Conference" arc, during Kazan and Ichijou's spar in the Underworld and the eponymous meeting.

Appearance
Breakdown High Wave takes the form of a hard and simple, if not unusually large, wooden rowboat paddle, with Kazan's name written on the blade, which is smooth and retangular. The water it produces, since is therapeutic hot spring water, is slightly tinted in green due to the levels of minerals in it.

Abilities
Much more like Incinerate Anthem and Zephyr Shift, Breakdown High Wave has the ability to create and control an element of nature, in it's case, hot spring waters, which temperature and features can be controled by the user's will, and as such, can be used both offensively or supportively. The amount of water produced is only limited to the user's stamina and energy and, if fully mastered, it has the potential to drown an entire nation.

Since the water is created from sacred gear, any form of water-based spells will be rended useless against it.

Weakness
The water Breakdown High Wave creates, despite having really high vaporation point, is still vulnerable against fire-based spells, which can evaporate it and be rended useless for use. Since the creation and control of water are dependable of the user's stamina and concentration, it's mastery requires a balance between them, which can be exhausting and distracting.