"And she just doesn't get hurt! When she's wrecking the towns, sinking battleships or eats direct gun or cannon fire. Her tough as nails body simply doesn't suffer as much as a scratch! As you said, she really is an iron ballon!"
― Capone Gang Bege (One Piece)
The power to
have body-tissue denser than what is naturally possible. Sub-power of Supernatural Condition. Advanced version of Enhanced Durability. Variation of Dermal Armor and Invulnerability.
Supernaturally Dense Tissue
The user's body-tissue, skin, muscles, bones, etc. is extremely dense/solid, allowing them to withstand harmful strains on the body such as crushing weights, impacts, pressures, changes in temperature, etc. They gain enhanced levels of strength and stamina, this is possible because of how hard their body has become, allowing them to resist tearing a muscle and/or their bones shattering easily.
May have a set duration.
User may sacrifice flexibility and speed for strength and durability.
User may be notably heavier than their overall size would suggest.
Not complete invulnerability.
May become heavier than normal.
May complicate receiving medical treatment.
Certain abilities that are capable of bypassing tough skin like Absolute Strength, Telepathy, etc, can be counteractive against this power.
Cang Du (Bleach) lives up to his epithet, "I - The Iron", turning his skin into impenetrable iron.
Nnoitra Gilga (Bleach) using Hierro to pressurize his spiritual energy onto his skin, turning it iron hard.
A Quincy (Bleach) such as Ichigo using Blut Vene to flow spiritual energy into their bloodstream, turning it inhumanly hard.
Gremmy Thoumeaux (Bleach) using "V - The Visionary" to imagine his body hardening to stronger-than-steel.
Kenpachi Zaraki (Bleach) possesses tremendous durability, his immense spiritual pressure acting as an armor of sorts. Even Ichigo's hands got injured in a backlash without harming Zaraki.
Ryūichi Sendō (Code:Breaker) transforming his skin into steel, increasing his defense and offense.
Skinn Bolic (D.Gray-Man) possesses an incredibly strong layer of skin composed of solidified lightning.
Broly (Dragon Ball Z) becoming the Legendary Super Saiyan, which reinforces his body with the tremendous ki to the point he is completely unaffected by Super Saiyan Gohan's punch in the face.
Torafusa (Fairy Tail) can alter the density of his skin that can not only stop Gajeel's magical iron but break it as well.
The Captain (Hellsing)'s tissues are hard enough that he can catch Walter's Wires in his hands, even though they can cut through whole skyscrapers.
Tōkajin (InuYasha) implanted Shikon shards into his body, turning it into an armor of stone.
A the Fourth Raikage (Naruto) inherited his father's near indestructible body, though to a lower level in comparison.
The Gray Hulk (Marvel Comics)
Kakuzu (Naruto) using Earth Spear to transform his skin into a harder-than-steel material that is near impossible to penetrate, aside from Lightning.
The Third Raikage (Naruto) possesses a near indestructible body even without his Lightning Release Armor.
Blueno (One Piece) has been trained in
Tekkai since childhood, turning his body as dense as an iron carapace, causing Tilestone's hammer to shatter upon recoil impact.
Monster Chopper (One Piece) possesses a tremendously hardened body to the point where superhuman attacks like
Rankyaku and Shigan simply bounce off of him harmlessly.
Bobby Funk (One Piece) was born with a very powerful body, in that even a Busoshoku Haki imbued axe snapped when it struck him.
Jozu (One Piece) turning his skin into unbreakable diamond, being able to further harden it by combining with Busoshoku Haki.
Luffy (One Piece) using Busoshoku Haki to harden his body to incredible levels.
Escavalier (Pokémon) possesses a steel-hard carapace naturally, and uses
Iron Defense to further harden its armor-like defense.
Tetsuhito Kagiroi (Tenjho Tenge) possesses an iron-hard body due to his clan's women drinking iron sand every night.
Yaya (Unbreakable Machine Doll) can harden any aspect of her body, even if they are not attached to her at the time, rendering her invulnerable to physical attacks.
Gatasubal (Yu Yu Hakusho) is composed entirely of a hybrid metal of combined steel and living cells, making it very difficult to pierce through it.