Let's Start With Power Level =

{(F- < F < F+ < FF- < FF < FF+ < FFF- < FFF < FFF+)

<(E- < E < E+ < EE- < EE < EE+

(< D- < D < D+ < DD- < DD < DD+ < DDD- < DDD < DDD+)

< (C- < C < C+ < CC- < CC < CC+ < CCC- < CCC < CCC+)

< (B- < B < B+ < BB- < BB < BB+ < BBB- < BBB

(A- < A < A+ < AA- < AA < AA+ < AAA- < AAA < AAA+) <

(S-

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(< EX- < EX < EX+ < EXX- < EXX < EXX+ < EXXX- < EXXX < EXXX+)}This Rank/Level Applies to All Items, Skills, Constitution, Mana, World, Magic ext.

"And Normally Using Skills requires Spirit and you can also use it with Mana or Constitution but with higher cost. Or you have Mana related Skills then You can use Mana or Spirit Energy. If you have skill related body enhancement then You can use Spirit or Constitution energy. As for how to use Spirit energy, Mana and Constitution energy Without using Skills"

"Then, You can use Mana for Magic, Farming, Crafting, Engineering, Potion making, Golems, Runes ext".

"You can use Spirit for Farming, Crafting, Engineering, Golems, Resistance to illusion, Will Power, Attacking SOUL, Creating souls through infusing spirit energy with Items, defend against Soul attacks, Better cognitive and control of power ext".

"You can use Constitution for Enhancing your Body, Enhancing your weapons, Living long life, it also reflects your durability, strength, agility, flexibility and resistance ext".

"Constitution and Mana Crystal are more Common then Spirit crystal because Monster's or Humans more use Mana or Constitution. Only a small percentage use Spirit because It's hard to get you have face life or death battle for it grow. If you Kill a Monster or Human or any other Race you can get a crystal of it's best attribute".