Sorcerer points are gained from Magic Cores, Magic Cores are from Cultivators and Magic Beasts. depending on the rank, they give more SP. SP can be used to rank up Attributes, skills, and upgrade spells.
I'm going to change how it works, so at every level, there's a gain of 10 SP, 5 are used to increase 1 Attribute Point, Skill Point, or Spell Upgrade Point.