in this world people can get things called marks when this happens a devil will target them devils(they can take on any form there power makes them) have magic that are meant to kill the marked person however, spartans(that's what you are) can fight the devils using there magic or magic weapons there are three duties of a Spartan protect the people and protect the gate. The gate holds a devil called the recreation devil(has the power to make and delete matter) devils come from a place called hell(a different dimension) going there would kill someone in almost 10 seconds because of the sheer amounts of devils there devils have an unknown origin. if a spartan uses devil container they can use the devil to make magic weapons(these weapons take the shape of the power they have contained and you CAN sell them for a certain amount of money depending on the lethality grade) there are seven grades the grades are(from weakest to strongest):
F
D
C
B
A
S
OMEGA
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they are more lethal the higher the grade these grade usually have a high gap between them.
most magic, magic weapons, most of the devils you encounter will have a grade from this chart.