Nen

 Nen is one of the three Attributes in this game. Eventually one unlocks different 'Aura' options which can be changed by holding down ctrl. Eventually one unlocks different 'Seek' options which can be changed by holding down ctrl. Eventually one unlocks different 'Hide' options which can be changed by holding down ctrl. Eventually one unlocks different 'Flow' options which can be changed by holding down ctrl.
 * 1) It increases hatsu damage.
 * 2) It grants 'Nen Points' when meditating which are spent in different catagories.
 * 3) Meditating is the most effective way to gain Nen levels, Once one reaches 12,500 nen they float and their Nen gain is greatly increased.
 * 4) Ten, Ren, Ryu, and Ken increases the amount of nen xp granted when meditating.
 * 1) Ten is unlocked at a nen level of 25, Ten grants a light defence boost.
 * 2) Ren is unlocked at a nen level of 100, Ren grants a medium boost to defence and offense.
 * 3) Ryu and Ken are unlocked at a nen level of 1,250, Ken increases defence while Ryu increases damage.
 * 1) Gyo is unlocked at a nen level of 150 and can be used to see people using Zetsu or In
 * 2) En is unlocked at a nen level of 2,500 and can be used like Gyo, However it instead covers a circular area around the player highlighting the radius and location of the people inside that radius.
 * 1) Zetsu is unlocked at a nen level of 50 and renders the player transparent.
 * 2) In and its weapon counterpart are unlocked at a nen level of 1,000 and can make the player or his or her weapon invisible.
 * 1) Ko and Shu are unlocked at a nen level of 750, Ko increases punching damage while Shu increases weapon damage.