mana is life energy so the older you get the less mana you have

mana is in anythiing that is alive , mana is not the same as ki as ki doesn't affect the lengh of your life

it is located in the heart chakra an can be used to open chakra points

mana can be programmed to act like thing its self and absorb ki and mana its self

mana can bring something back to life or take a life

mana is very dangerous and i suggest not using it unless needed