@DrWhoCares
Lol! Well, it isn't wrong (though by god it sounds like a troll desc). We will need to look into the usage of the word, bullshit has a negative connotation to it. If the word in in Japanese is also not the most appropriate language to use in a normal polite/non degrading dialog, then bullshit it is.
I can't read japanese worth crap, and have no knowledge whatsoever of what the original word means. But assuming it is just another way to say made-up(and doesn't have a strong negative connotation to it like bullshit), I will offer these as possible alternatives
fabricated, imaginary, fictional
exaggerated, pretentious, unrealistic
extravagant
she skillfully convinced the higher-being that caused the "Degradation Mode" accident into giving her "The ability to create any potion with any effect I can think of"
This part really doesn't sit well with me, and only partially because I have no clue what "Degradation Mode" refers to.
She did get the god of her world, the one who killed her, to promise her cheat abilities. However, he could not give them to her since he was not in charge of the world she was to reincarnate in.
The goddess of the world she did reincarnate in did promise her this ability. This goddess was in a "dumb-ified" state, intentionally lowering her intelligence level so that she could talk with Kaoru. This is the reason Kaoru believes the goddess agreed to give her these obviously OP skills.
If the higher-being refers to the goddess, then I question what accident this goddess caused. The only thing I think it could refer to is the overly reduced intelligence level. But as this was intentional (but overdone), the word "accident" doesn't sit well and saying she caused it, though not wrong, seems odd.("firefish5000 caused himself to jump....). Something more along the lines of
'She skillfully convinced the higher-being that was in "Degradation Mode" into giving her'
would flow better.
In the off chance that it refers to the other god who killed her (in a distorted or possibly degraded region of space), then something is definitely wrong.
If you didn't change this part of the description, please consider it. (and if I am the only one who doesn't think this is wrong, let me know and I will reread)