Shikotsumyaku: Eight Directional Gates

Lord Muzai creates a frame of sharp bones from below or around his intended surface. From that frame, more bones emerge, constantly growing in number until a thick gate of interlocking bones are formed. The gate has a multitude of spikes protruding throughout it's surface. Cleanly white, this ivory demonic appearing gate has a Kaguya Kanji located on it's center. Heavenly Door to Takamagahara has a unique ability to grow spikes out towards anyone who comes within a certain range, turning it into a gate of self defense. This allows him to close off areas without worrying of people getting close. Just in case someone breaks through it's spikes, The Heavenly door's strength surpasses that of tampered steel. Allowing it to withstand against Jutsu that surpass A-Rank. And just in case of it's destruction, Muzai can channel chakra through it, thus regenerating this gate. When it served it's purpose, the gates bones release one another and disappear.