Secret Shikotsumyaku Technique: God of Eight Banners

Muzai Kaguya realized that, although his body was nearly indestructible, his skin and muscle remained vulnerable. So Lord Muzai created a technique which would form a skeletal armor around his body. This armor resembles that of traditional light Japanese armor. It covers most of Muzai's body with protruding spikes for offense and defense. Muzai can lighten up his armor to increase his overall speed and agility, or increase it's density which in turn, boosts his overall offensive power, being able to easily break through a steel gate. It's major downside is that he cannot activate them both, meaning he can only rapidly switch. Muzai's armor also allows him to morph more spikes and blades from multiple locations.

Lord Muzai can coat certain parts of his body with this armor, which is mostly used before an attack. By surrounding his leg or arm and increasing density right before a hit, his offensive strike is increased exponentially. Muzai, through careful chakra control and mastery, can make an armor for someone else's use.