xine_reader
a jutsu which would strengthen the physique of the body, would be played well with the technique of "8 gates" / or "Seven Breathing" enough to strengthen the physique of the wearer and thus be able to activate the doors without physical repercussions. In the end, this is the big problem with the doors, it is that the body of the wearer is unable to follow the road and is damaged because of the activation, this backlash would be nul with a body strengthening technique like "Earth Spear" or "steel release".
MC should create a all-rounder jutsu like - human body have electricity which we can take upto 100 volts normally, imagine how much MC could generate with CHAKRA (Combi of Physical/Life-Force & Mental/Spiritual-Force) which has millions or billions of cells plus there is nature/sen/sage arts and as Otsusuki are also there there should be universal/cosmic energies as well. To ♾️ & Beyond....