Hyoukai

Hyoukai is a jutsu that is taught only within the Riyousha, though that doesn't mean other clans/families can't learn it from them. The jutsu, once activated, will make the object that the user is touching either soften or melt. The user can also make so that not everything they touch melts or softens, simply because of 'mind over matter'. A well developed version of this jutsu will allow the user to melt/soften himself. After deactivation, the object(s) that the user melted/softened hardens, etc.