RANKS (EASY ACCESS):
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[F]
F rank = 1 star knight = 1 circle mage = – = F rank mana beast.
Stage 1 knight art = Tier 9 mage spell
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[E]
E rank = 2 stars = 2 circles = Common demon = E rank mana beast.
Stage 2 knight art = Tier 8 mage spell
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[D]
D rank = 3 stars = 3 circles = Baron demon = D rank mana beast.
Stage 3 knight art = Tier 7 mage spell
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[C]
C rank = 4 stars = 4 circles = Viscount demon = C rank mana beast.
Stage 4 knight art = Tier 6 mage spell.
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[B]
B rank = 5 stars = 5 circles = Count demon = B rank mana beast.
Stage 5 knight art = Tier 5 mage spell
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[A]
A rank = 6 stars = 6 circles = Marquis demon = A rank mana beast.
Stage 6 knight art = Tier 4 mage spell
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[S]
S rank = 7 stars = 7 circles = Duke demon = S rank mana beast.
Stage 7 knight art = Tier 3 mage spell
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[SS]
SS rank = 8 stars = 8 circles = Grand Duke demon = SS rank mana beast.
Stage 8 knight art = Tier 2 mage spell
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[SSS]
SSS rank = 9 stars = 9 circles = Demon King = SSS rank mana beast.
Stage 9 knight art = Tier 1 mage spell
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Note: In terms of strength within the same rank, it goes like this.
Demons > Humans > Mana Beasts.