Umi Hiroi

Mare Viri et Dei is a technique used by those possessing the Radiation Release kekkei genkai, and was developed by Therion Tetsugaku after his departure from Tantara. It is among the stronger Radiation Release techniques, and is capable of causing massive damage to the surrounding area.

The user will begin this jutsu by concentrating a large amount of their radioactive chakra into a single point, compressing it to the size of a mere pea. It will then be fired outwards at a high speed, and as soon as the user forms the seal required for the activation to begin, this mass of chakra will detonate into several thousands of thin blade-like shapes. These needles are numerous enough to "rain" down upon the opponent, as well as any others in it's range. The force of the detonation will propel them at a speed high enough to give the blades impressive piercing potential. Once any of them pierces into something, they will detonate as well seconds after into much smaller explosions, although still capable of doing moderate damage. Furthermore, if the user can maintain their focus while using this technique, they could direct the blades towards a certain point.

The initial detonation will also send out a shockwave which is likely to knock the opponent right off of their feet, and the searing heat released will soon follow. At point blank range, one could simply be killed by these effects alone. The jutsu will cover a large radius, but can be stopped by a durable enough defense. If the USER isn't careful, they could be killed by their own technique.