Since the sword merged with the previous hero's flesh and blood, I assume that the size of the blade depends on how much flesh and blood is put into it.
If you peeps want something similar but not complete slop, then I suggest Overpowered Sword. It actually has an MC who works hard from nothing and gets rewarded with a tomboy hot chocolate waifu
"No, you're a stranger to both of us, and no matter how curious we may be, that doesn't change the fact that you're asking two children to follow you, an adult, into an unknown location."
Wait so the other guy that isn't mc is just giving out gacha equipment to everyone and slowly farming gems from people that aren't even in his party.
holy frick
I wanted to write something more succinct and constructive but the only thing I'm able to say is
uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuegh