Attack on titan
the MC would be reincarnated into attack on titan with a broken system.
The MC would be a titan and would evolve by killing other titans gaining more fragments of the founding titan.
This is where the system would come in it would keep track of his fragments and give him missions eventually giving him the ability to turn into a human.
The MC would be evil.
CREATORS' THOUGHTS 
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Emojikeyboard If you use this leave my daoist title in authors thoughts
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