Hey I got a question for you.
do you find this fanfic idea interesting
Isekai setting fantasy world
Isekaied male/female reader gains a system
However in order to use op skills, like abilities of rimuru, highschool dxd, bleach, DVD, and many other TV shows, books, video games, and movies. There are trials that the reader must go through three different settings, easy = dealing with a near brain dead character, so base instinct easy win, medium = retains some intelligence able to use some skills of the character but on a much weaker strength, extremely hard = you now face the character at the height of their power and now fully cognitive of themselves.
Now they would start off small, the basic system of
HP
Stamina
STR
Vitality
Defense
Agility
Perception
Mind
And these will of course increase over time either by normal means or challenges.