Board Thread:Fun and Games/@comment-28715560-20170716173336/@comment-26038291-20171027201816

Quirk Name: Cooling

Type: Emitter

Range: Medium Range

User: Yukio "Yuki" Hayashi

Alias: Bifrost

Description: Cooling is a composite quirk, consisting of two inherited abilities combined into a singular mutation, both of which synergize to create a quirk completely focused on regulating the temperature of both Yuki and his environment.

The first ability is the rather simple capability to cool down one's body to a temperature of less than -215 degrees Celsius. Yuki does this by venting out most of the heat in his body through his breath and pores, as well as slowing down his metabolism to generate as little heat as possible while maintaining enough energy to allow Yuki to stay awake. His cells will rapidly adapt to his temperature as to not die out because of the sheer cold. He must stay physically inactive to both prevent himself from raising his bodily temperature too much as well as avoid tiring himself out. While active, the low temperature causes air that comes into contact with him to become misty, as it is cold enough to liquefy most prominent elements in the atmosphere.

The second ability grants Yuki the ability of aerokinesis, the power to manipulate air, allowing him to attack and defend with wind currents. Notable is that he is only capable of utilizing this ability when the air in the environment has entered his body first through a special mutation in his skin structure, allowing him to 'ventilate,' absorbing the air around him and transferring it through his blood like regular respiratory actions and exhaling it from either his skin again or his mouth, although at a slower pace, which he can accelerate through using both in conjunction.

Both of these abilities synergize by causing any air Yuki inhales while in his cold state to cool down to his temperature and then exhaling it again to rapidly cool down the air around him in a medium-to-large radius, weakening his enemies and allowing him to have an advantage. At lower temperatures, inhaled air can be liquefied as it enter his bloodstream. Once the air has been liquefied, it can be emitted and utilized like regular air in a form of pseudo-hydrokinesis, freezing any solid surface it makes contact with, including Yuki's body, and used to create frozen constructs.

Techniques:

Cryogenic Marathon Sprint: By creating skating blades on the soles of his footwear and the ground under him, Yuki may use his makeshift ice skates quickly dash forward. By utilizing exhaled air, he may even propel himself forward to go even faster.

Absolute Zero: Utilizing his ability to its fullest extent, Yuki indiscriminately cools his entire environment to his lowest possibly achievable temperature, causing everything within a large radius to freeze solid, including Yuki himself. A last resort that relies on teamwork to deal with his enemies while he's disabled.

Weaknesses: While his body is capable of rapidly adapting to his temperature to allow him to survive, there is a limit to how low he can go, a limit which he has a hard time judging, which makes him very vulnerable to succumbing to hypothermia. He generally avoids lowering his temperature further once the air around him becomes misty.

Cooling down his own body puts Yuki on a time limit. His slowed metabolism barely creates enough energy to keep him awake, and most physical activities can be extremely draining to him in this state. He can generally save up enough energy for long-time engagements by crouching and not moving, but that leaves him vulnerable by the sole fact that he is not moving. As such, his quirk is generally better utilized in a supportive way, rather than an offensive one.