This is a world of summoners, with all kinds of summoners. In a world like this, only those with greater summoning power can rise above the rest and earn the world's respect.
Summoners are divided into ranks, too. The three lowest ranks are Summoning Apprentice, Trainee Summoner, and Qualified Summoner. Though these are the three lowest ranks, even becoming a summoner is a rare feat. Most people have almost no chance of becoming one.
