The user can create incredibly hot and corrosive steam by mixing Fire and Water chakra. This steam can take different properties and vary in temperature, but is difficult to control the dimensions of the steam once it begins to spread. Likewise it can harm allies just as easily as enemies so it is not suited to team play, though Tomoko has the sense to be more tame in her techniques as the situation requires. A passive effect of this Kekkei Genkai is that Tomoko has an unusually high core body temperature though she suffers no ill effects from this change in her physiology.

The wide area coverage capabilities and sheer power make it very easy to bypass or destroy the defenses of her enemies. Even steel is melted with ease when in contact with the steam. The physical boosts that Tomoko can give herself also make her a powerhouse with controlled bursts, making her even more dangerous in close quarters than at range. All the while her body itself can burn hot enough to injure anyone who actually touches her, though not as badly as the steam surrounding her would burn them just for getting close. The slightest contact with Tomoko's steam is enough to hospitalize a victim, being fully engulfed by it is immediately fatal. Tomoko herself is immune to these deadly effects and can use that to her advantage, often creating a "killzone" and operating from within that during combat for her own safety.

The biggest weakness of Boil Release would be Wind techniques, as they can hinder the steam and create openings in Tomoko's wide area coverage. As well the steam itself isn't exactly slow to spread but any shinobi worth their salt can outrun the steam before it reaches them, which would be infinitely wiser than attempting to defend from it and far easier to actually accomplish.

All Academy Techniques

Boil Release: Clouded Bubble Technique

A

Long

Under most circumstances the steam of Boil Release techniques can't spread very quickly or ultimately reach long distances. Tomoko has instead opted to create a technique to improve the range and utility of her Kekkei Genkai. The Clouded Bubble Technique creates large bubbles from Tomoko's mouth that are filled with the corrosive steam. As it is contained within the bubble it does not spread until the bubble is popped, in which case the steam explodes outwards very quickly before slowing down to its usual speed. The initial explosion radius of each bubble is approximately five meters before the steam slows down, but being within the initial five meters is guaranteed death. But while the bubble is intact it can move very quickly. Tomoko can launch these at enemies, allowing her to attack enemies at long range. She can even control the bubbles mid-flight to home in on certain targets. The bubbles themselves are actually relatively strong, requiring puncturing attacks to be popped by anyone other than Tomoko. This also means that those (with balls of steel) can touch the bubbles themselves or with weak attacks and avoid rupturing them. Non-piercing Wind techniques can affect the flight path of these bubbles but as Tomoko still has control over them it doesn't affect them enough to entirely prevent a bubble from reaching proximity to its target. Worth noting is that this technique is chakra efficient, meaning she can use it repeatedly at surprisingly little cost. Spamming this technique would obviously begin to add up but with a bit of self control she can get a lot of mileage out of these in a fight.

Boil Release: Purging Heaven

S

Long

Essentially the use of many Boil Release: Clouded Bubble Techniques. Tomoko spews many bubbles filled with her corrosive steam straight into the air, where they disperse out above the target area. Once in position they will then descend back to earth, where they will all pop at the same time once they are a few meters from touching the ground. This is used to cover a large area in a very short amount of time, allowing Tomoko to melt an entire area along with everyone and everything inside it. It is most effectively used under low visibility conditions for a surprise attack, as it is noiseless and the bubbles will be difficult to see. Though realistically the stealth isn't needed as most shinobi have no means to guard from this nor have the capability to escape its range in time. This technique is akin to a weapon of mass destruction and its use weighs heavily on Tomoko's conscience. She can just threaten the use of this attack as an ultimatum to coerce her enemies into surrendering to avoid annihilation. The chakra cost for this technique isn't even particularly cumbersome, though it is taxing enough to where Tomoko wouldn't want to use it after spamming ninjutsu. The only thing keeping her from using this technique to deal with any enemy is her own sense of morality.

Boil Release: Burning Passion

C

Close

By heating the chakra in her body to an extreme degree, Tomoko can superheat the air around her. This is objectively less effective and powerful than her Boil Release: Skilled Mist Technique, as the heat will severely hinder nearby enemies but will not damage them unless they have prolonged exposure, but serves alternate purposes outside of combat. She can tone down the heat and basically serve as a radiator, providing heat to nearby allies and keeping them warm, or she can dial it up and use extreme heat to melt snow and evaporate water nearby without setting anything on fire or damaging anything else in the environment too much. This technique has seen less usage after the Long Winter had ended but her benevolent usage of it helped earn her fame as Aunt Tomo.

Boil Release: Boiling Technique

C

Medium

Simple in design, effective in use. Tomoko can heat existing sources of water in her area, making them reach their boiling point within seconds. This is often used in conjunction with water techniques to increase the damage potential by making the water scald her enemies on contact. While theoretically Tomoko can heat the water even further she would see no benefit in doing so as that would just evaporate the water very quickly and be very useless. Boiling is more than hot enough to hospitalize her enemies with relative ease.

Boil Release: Sprung Trap

B

Short

Tomoko's counter to Wind users. She imbues her corrosive steam into seals on the ground or other objects with either her hands or her feet, setting traps that will later eject that steam when activated. The jet of steam is brief, as it will quickly destroy the surface it was sealed on and thus destroy the seal, but the seals are small and hard to see if one isn't looking for them. When faced with a proficient Wind user Tomoko will place many of these around the battlefield during the fight and activate them once she lures the enemy within range of one of them. This is less effective against non-Wind users than simply using her wider ranged techniques and is arguably less cost effective as she has to also use chakra to make the seals themselves, thus why it is generally used as a means of defending herself from her only natural counter. Once the Wind users have been eliminated by surprise attacks then she is usually free to melt the entire battlefield as she pleases.

Dual Ninjatos

Swords

Two straight-edge shortswords that are small enough to be wielded with one hand or with two for extra power. Though they are of fine quality they do not see much use from Tomoko as she is liable to accidentally melt them, which wouldn't be the first time she has disarmed herself. They do see use when she isn't heavily using her Boil Release, such as training or low-effort combat scenarios.