System shop at level one sold skills from Normal Grade to Basic Grade, items from F and E grade, weapon Arts.
At Shop level two, skills from Rare Grade to Magic Grade, items from D and C grade
At shop level three, skills from Epic Grade to Legend Grade, items from B and A grade, Bloodline.
At shop level four, skills from Mythical Grade to semi-god Grade, items from S and SS grade, Physic.
At shop level five, Skills from God Grade are available, items from SSS and EX grade.