Hollow Combat/Trained

**Kūdō** (空道, Hollow Way) encapsulates a variety of instinctual techniques available to any hollow but when the Hollow is granted the time, power of mental capacity to actually train with them they are able to take their techniques to new heights.

## ***Techniques***

### *Cero*

* **Cero Órbita** (Orbital Cero) A special technique where a hollow will release their cero and then through the use of the garganta organ trap the released light into an orbit around themselves by curving spacetime.

### *Bala*

* **Bala Oscuras** (Black Bullet) A technique where a Hollow will compress their reiryoku into a state where it becomes a black hole of spiritual energy but then through the use of their Garganta they can distort and invert the direction of space time around the singularity for but a split moment allowing for the hyper compressed reiatsu contained within the spiritual singularity to not only escape but also be tremendously accelerated by this exit. Distinct from the Cero Oscuras which ejects all of the energy out directly for maximum destruction this technique can be used to control the amount of energy released allowing for one to use it in a more controlled fashion.

### *Hierro*

* **Diamante** (Diamond) An advanced variation of Hierro only achievable by those with knowledge, energy reserves and patience, it mimics the Shinigami conception of **Tendachi** (天立ち, Heavenly Stance). By utilizing Hierro at different degrees differently in individual cells and tissues a Hollow is able to individually reinforce every component of their body but more importantly control the exact degree of hardness each individual muscle cell exhibits allowing a hollow to make their muscles possess a lot more elastic potential and thus more ability to generate power. At its base this ability slows down a hollow and when used to its utmost would leave an hollow utterly unable to move but skilled practitioners can selectively control the Hierro's intensity only using it when needed to generate power without loss in speed.
* **Hierro Oscuras** (Black Steel) A variation of Hierro where a hollow will force the reiryoku within their bodies to become so compressed it'll become a spiritual blackhole. This technique actually does not seem to provide any benefits other than preventing one's reiryoku from being stolen and if one is able to use their Garganta Organ masterfully they can make use of it to release the energy outside their body in the form of Balas of such tremendous power they can be mistaken for Ceros, this is the only way to recoup the now trapped reiryoku for the future otherwise the hollow will be unable to recoup the reiryoku in the blackhole since it cannot escape. By keeping one of these within their body a hollow is able to shoot out "instant" Ceros at will so long as the spiritual black hole has reiryoku within its singularity.
	+ **Hierro Pálido** (White Steel) a technique where a Hollow will compress their reiryoku outside their body into a state where it becomes a black hole of spiritual energy but then through the use of their Garganta they can invert the direction of the warping of space time allowing for a hollow to generate a forcefield that repulses everything away from the epicenter of this compressed reiryoku.

### *Sonído*

* **Estruendo** (Cacophony) the evolution of Sonído, it consists of lining the inside of one's reiatsu vents with Hierro so as to allow dangerously high levels of compressed reiatsu to flow through them. By increasing the durability with hierro the hollow is able to both generate more reiatsu and endure more of it as well.
	+ **Relampago** (Lightning) is an advanced variation of Sonído which is achievable by **not** reinforcing the reiatsu venting system as thoroughly as possible with Hierro and allowing blood vessels to be destroyed by the pressure a hollow creates *internal bleeding*. This internal bleeding would be problematic but because of the small size of the damage all hollows are able to heal it nigh instantaneously and the blood inserted into the system increases the reiatsu flowing out from cero level into the gran rey cero level. The end result is a jet of recoil with so much power that the resulting sound is that of thunder and the reiatsu often appears visible when released.
		- **Ligero** (Light) is an advanced variation of Sonído achievable by directly creating cero in the reiatsu vent to provide the thrust instead of merely venting reiatsu allowing for a Hollow to achieve tremendous speed although they also leave a trail of destructive light in their wake as they move. Can be theoretically combined with blood like **Relampago** or combined with Cero Oscuras to generate even more thrust from minuscule gran rey ceros/cero oscuras but at such a level of power a hollow runs the risk of accidentally blowing themselves up from the inside rather than accelerating any faster.