This might sound crazy & unbelievable but b4 the recent jjk leaks I actually had a reader insert planned w the exact same premise.
Reader was (& perhaps still is) a twin, but she had eaten her sister in the womb & she ended up sort of absorbing her cursed technique.
There’s a whole bunch more to it & I had it planned out & everything but it kinda feels unoriginal now thx a lot gege ‼️…