["First st"]
skin refinement, 1 - 2 ly
strengthens the body's skin and flesh.
["Second st"]
blood essence, 1 - 3 ly
unlocks the gold blood giving higher purity.
["third st"]
refine bone, 1 - 4 ly
making and iron skeleton unlocks the second skeleton body.
["fourth st"]
core furnace, 1 - 6 ly
enhance cultivation space.
["fifth st"]
sovereign soul, 1 - 9 ly
connects the spirit and soul giving higher dexterity.