Hyōsō Yūkai




Surface Melting

Also Known As

Flux Coat



First Seen

Dark Titans

A variation of the Bakusai Tenketsu that attacks metal on the atomic level. The technique requires a significant amount of precision and focus to pull off successfully making it nearly useless in battle.


Unlike stone, steel and most of its alloys are highly resistant to sudden shocks, which is indicative of high energy transference. Which is why they are so resistant to the Bakusai Tenketsu. For instance if you hit a rock with a hammer, it shatters. Yet if you hit a block of metal with a hammer, it barely even leaves a mark. Often, steel is hardened in a furnace by raising it above its critical temperature. This makes it very hard, but also more brittle. So, manufacturers concerned with sharp impacts, such as powered armor producers, will then temper the metal to increase its toughness again. The reason for that is that the grain structure of steel while in its Austenitic phase, just after it's been hardened is very rough and full of stresses. After tempering, the grain structure is reformed into Martensite, which possesses a much finer grain structure.

To overcome this problem the Hyōsō Yūkai attacks the atoms of the metal. The atoms in metals join together to form a crystalline lattice Hyōsō Yūkai fractures the crystalline structure of the metal to induce metal fatigue. This technique is useless on pretty much anything but metal and other similar materials. It’s only the fact that metal atoms don't join together to form molecules like most other things that allows the technique to work.

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