Saikes is one, because it’s a cursed sword which gives the user extra strength, and the previous user was dying of cancer and us

Continuing:
Used it to prolong the effects

Ok a couple conditions:
Has to be an older sword which can’t be replicated
Has to do something else than be a normal sword

The BloodScorn Sword is 8,000 years old, cursed by the blood slain by it and the sword's creator and it hasn't been replicated ever since its creation.
Does that count?

How do I say what I want to say without making it seem like I want to crush people’s dreams

What

The Creator’s Bladesmith weapons essentially are the strongest due to their godly essences infused into them

Ok but like idrc
I’m trying to make a list of legendary swords, not swords some blade smith can pump out

No sword is Legendary without the user. There’s a reason why the Stone in the Sword is so popular (King Arthur)

it can be

what if the bladesmith made a weapon that’s just like comically large but still light enough for a normal dude to hold

Hmmm, Well Tronus's sword (nicknamed The Core Blade) is used to channel powers into the user, and is EXTREMELY sharp. Able to cut through the toughest of metals and flesh. It actually once damaged Collectors Armor.

The core blade is the best you could come up with?

Dawg, Idk what other names could be

Ivan stole a sword once that gives him some magical abilities but it is currently locked up in a vault because of it's corruption.
Not sure if it is one of the strongest but it is definitely strong.

Ooooooooo you’ll never comment on one of my posts again oooooooooo

That's just a swirl my friend, it won't work-
Wait who are you? Why am I commenting on your posts?