This suggestion is for a series of Whip-like weapons called Whiplashes. What this weapon lacks in damage it makes up for with an above-average attack speed and a very good reach (plus it'd give us some "fast" swords/melee weapons that aren't Piercing or Normal)
The Normal attack consists of a basic 3-swing combo (swing left, swing right, swing left again or the other way around)
For the Charged attack the Knight lashes out with the whip. Any enemy hit by this attack receives a decent amount of damage and is yanked towards the wielder.
From the basic 2-star normal-damage item the Whiplash splits into three paths:
-The Razorwind series, which are identical to the normal Whiplash aside from higher stats.
-The Helltongue series, which deals Shadow damage (with a chance of inflicting Fire.) It has a more 'Demonic' appearance and the whip itself is now covered in an eerie 'Dark Fire'
-The Gigajoule series, which deals Elemental Damage, it has a 'High-Tech' aesthetic and a whip made out of Energy.
Weapon Names
2-Star: Whiplash
3-Star (N): Barbed Whiplash
3-Star (S+F): Fiendish Whiplash
3-Star (E): Energetic Whiplash
4-Star (N): Savage Whiplash
4-Star (S+F): Infernal Whiplash
4-Star (E): Charged Whiplash (named by Schattentag)
5-Star (N): Razorwind
5-Star (S+F): Helltongue
5-Star (E): Gigajoule
I kind of like this idea, actually.
While the weapon itself doesn't have any particularly fancy mechanics, it does compensate with a very interesting charge attack; ergo pulling enemies towards you.
This will make it a lot easier to finish off fleeing opponents such as Gremlins and whatnot; trick is you'll need another sword or a close ranged weapon with this as a sidearm or it'll spell doom for you.
That being said though, this makes a very good utility weapon for sword and Blitz Needle users.