I'm ranking these in combat effectiveness and power even though all quirks can be used in different and creative ways.Also for reference F and D aren't bad just situational and not as useful their on the same level as Hakagure(Invisible Girl's Quirk),C and B would be good in combat but not amazing they'd be on the same level as Kirishima and Kaminari,A would be Bakugou's or Todoroki's quirks basically super powerful,and S is a quirk that with training is extremely powerful and can kill almost anybody.
F Rank
Body Modification and Controlled Copying
D Rank
Sleep Depreciation,Twist,Negate,Object Fusion,Damage Control,
C Rank
Metal Head,Blood Infection,Bounce,tracking throw,color,fluff,Realism,Ants Nest,Bubble,Animate,Weight Control,
B Rank
Fear Illusion,Frost Hands,Warp Punch,Railgun,droplet,Chainsaw,Push/Pull,Amp,Spider Silk,Zone,Nerve Pain,Arrow,Iron Blood,Brick,Exploding Blood,Falcon Hair,Zero Air,Paper God,Gravity Butterfly,Sharp,Combustion,Steam,Blizzard,Hand Canon,
A Rank
Lava,Power Transfer,Mochi,Back and Forth,Living Weapon,Bomb Maker,Growth,Natural Disaster,Sensor Illusion,Venom,Jolt,Finger Gun,Memory, Colored Gas
S Rank
Time Stop,Reality,Time Erase,Love and Cannibal can very widely but if Cannibal is being used by an evil serial killer I can see it being A even S if they gain enough power a hot person using Love May be B tier but it's just really situational since if Luffy showed up you'd be done for.Now that's out of the way please comment below if your curious about my choices!And if I missed any quirks or something.
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My Fan Quirks
FanfictionJust some Quirk ideas I came up with feel free to text me any quirks you may have and I'll be sure to post them also feel free to use these quirks in your own Stories I don't mind! (I have over 50 quirks and I don't know how I did it!)