Hell yes, your idea with the Spur seems like an awesome idea. Starting out weak, warming up over longer fights. Absolutely perfect.
I don't play Wakfu: Monthly subscriptions scare me. My only weakness! Especially if the game tries to market itself as free while severely limitting non-subscribers... *shudder* Not to take the game down. Heard it's fun, and the whole political system seems like a pretty creative and unique concept.
Well yeah, I'd actually compare this mechanic to... the pokemon attack Fury Cutter(there do seem to be many jokes concerning the franchise here, especially concerning pets. I hope the game's are not that despised in this community). It's pretty basic: Hit the enemy several times in succession with the attack, and the attack grows from pathetically weak to a shower of highly potent attacks that may even be able to wipe out entire teams. Slow and weak warmup, high payoff.
Well, about which percentage... I think if we keep it at the current damage(which may actually work if it actually pays off using it for longer confrontations), which may likely be somewhere at 50%(keeping the disks out of the formula), let's say... 8% damage increase per hit, 2% for disk-hit. The cap would be somewhere at 200% damage increase, meaning it basically turns the basic 50% power of the weapon and turns it into 150%. This requires 20 consecutive attacks, however, bumbling around between attacks will leave you with much more. Mind you that these are actually about 7 combos which you are likely to pull off in a battle room. However, the percentage should also fall rather rapidly: 4% per second while over 100%, 2% per second while under 100%. On full charge, this is a damage buff of about 2.5 minutes, with after 50 seconds your damage goes below average again. A single full combo leaves you with 15 seconds time to find your next target. I hope this is balanced enough, because I'm not too good at numbers. Needless to say, this new Spur wouldn't be only a gunblade, but actually an extremely offensive berserker-sword, ecouraging a rabid and HIGHLY aggressive playstyle. What i love, because different weapons are different weapons and should thus diverse in playstyles as much as possible, especially since we only have 3 classes to go from.

The sealed charges of mine are actually supposed to work as some sort of extension of the sword slash on the ground, hitting through enemys and stuff. Of course, it shouldn't actually compete with the AOE of bombs... only make the weapon particulary potent against enemy clusters. Heavy swords already are good at this kind of stuff, after all, so the ground signs could be a nice extension to that. The Avengers would work great if you're cornered/halfway in the enemy cluster(doesn't Avenger actually imply punishing the enemy for something?), and the Gran Faust would work on bigger clusters and on a... "safe" distance(you still need to be almost in front of them, but at least you don't need to allow them to almost trap you in their masses). Think of it less like a bomb, and more of an enemy-penetrating, extended sword-slash that actually consists of seals on the ground.

Already realized that the Ice-brandish and the black katana are missing, but didn't bother about asking because I already knew you likely have some plans for it.

@Atrum: Our router gets restarted quite frequently, and the problem always remains. That ain't gonna do it.

These attributes are alright, as long as you aren't going to change the other stats of the weapon line or want them to have more max damage potential depending on Stars. 'Cause then this needs rebalancing ;D

Do want. A berserker-sword. Aw mah gawd. Just the imagination of having a sword that actively encourages super-furious and aggressive playstyle. It would actually make me want to use a sword again(fell in love with guns quite a bit). It would also appeal to the breed of the Leroy Jenkins in all of us, being rewarded for going for as much hits in the least time as possible.
Well, and this is also kinda what my point is: Make the weapons differ in function and role. It makes stuff all the more fun and versatile. And, most importantly: Less grindy.

Alrighty then. Are you going to post that reimagination of the Spur in your thread, or what's happening to our new furious Spur(Fury Spur... Spury?) now? If so, would you mind mentioning this thread or at least my name?

I just thought it may be from advantage to summarize it into a single post in your thread, because originally this thread was about something different, after all.
Oh well, doesn't matter, tho. I guess it will be fine as it is.

Anything else to say? Maybe about the Spur, maybe about the other weapons?

Kinda lacking the time to spam another great textwall in this thread, so I'm keeping it short:

The damage thing most likely isn't a great idea, for the reasons you specified.

For a weapon that relies on having a single long series of attacks, knockback is pretty contraproductive imho. Not to mention that already quite an amount of swords, mainly normal-damage ones, serve the role as knockbacker. Still, I could imagine having some applications here and there, but if I'm really honest, the charge would be better spend on something else.

This leaves us at the status thing.
I'll exclude stun and poison for now, simply because I think we could do better than that. We have a unique mechanic, why give it such a commonplace status?
I think this whole wind debuff is a very funny idea, but I don't really see how it would benefit the user or its team in any way. It would kinda make it harder for other people to take on crowds, because you give them super-repel abilitys. The polaris/nitronome of the swords. This is bad. Also, I think it may be a bit silly to introduce a new status for just one sword. This could be redeemed by giving enemys/other weapons that ability too, but enemys couldn't handle it well(knights aren't so much in crowds) and it may be difficult to implent it into other weapons right.
When you talked about a new status and knockback, I had the idea of instead somehow creating an air aura around enemys tthat completely removes friction to make them bounce across the room, damaging themself and others upon bouncing on stuff, a bit like how quicksilvers charge each other up by bouncing on them. Hit your enemy with a projectile, make them be the projectile. In soviet russia, bullets shoot enemys. Pretty fitting for a weapon that utilizes hits on careless enemys to get stronger hits on other enemys, huh?

Other than that, besides giving the enemy debuffs, I actually wonder how you like the idea about the super-mode stuff? It eats your bonus at a ridiculous rate(essentially, it's pretty similar to your all-bonus eating charge), but instead of an attack with unique debuff, it's a BUFF ON YOURSELF. A self-buffing weapon, that's actually pretty special for this game. It would only work for this weapon, as usual, but would give you a significant bonus to damage/speed. Say, you change your bonus-drain from 2% to 20%, leaving you with maximal 10 seconds of supercharged state in which you gain an extreme increase in attack speed/damage/movement speed. Basically, hyperactive. This weapon already is all about fast gameplay, so why not give it a buff that makes it seem like everything else is moving in bullet time compared to you(slight exxageration, but you get the idea).

Going to ask your paragraphs with my paragraphs:

Exactly.

That was actually the plan. A pushing move. Like in, getting rid of all that potential damage you would get in the long run and just squeeze all your combat power into these few seconds. Wether it's suicidal is debatable, though: In fact, that final burst of combat power may be able to save your rear from the terrible demise of getting handed, as you would go for broke and spend your last seconds before defeat in super sayjan mode. It's a tradeoff: Either having a longer lasting attack buff or risk everything by consuming all your power in a tenth of the time, granting you inhuman speed and power with your attacks.
That being said, the supercharged knight should also get a movement speed increase. Why? Because it fits greatly with the whole charge, and it can't be wrong to make a knight faster than the rest for maximal 20 seconds, and considering these 20 seconds are likely to be spent inside a danger room, people won't really be able to abuse it to travel the dungeon faster than everyone else. Movement speed increasing gear is likely not going to make it into the game, and that for good reason. However, I think a buff lasting less than a minute and only really usable inside danger rooms/monster-filled rooms in general(as long as you got these 200% just the moment you activated the charge, which won't happen unless it's a very specific scenario) can't be too bad.

Know Wakfu, know Dofus. You don't need to specify what kind of games they are, I already know. Describing the classes is good enough.
So a rapidly speed-increasing debuff reminds you off a skill that turns every attack into splash damage? Odd. I'd rather compare it to eating garlic mid-battle. And yes, someone WAS silly about that. It does sound really long-range oriented. Guess it makes sense in-game, though.

Again, part of the plan: Turning the charge attack into an alternative action. The designers never said weapons only have to attack with both, if that makes any sense. If they did say so, they are stupid for wasting both actions for attacks. Back to seriousness: Trying to create charge attacks that actually aren't attacks already would help increasing variety of swords. Swords need variety. They are way too versatile right now, and lack actual features that distinguishes them from each other. This is partially the reason noone uses 50% of the swords. Broadening the spectrum of abilitys of an item other than actually attacking would make weapons infinitely more versatile.
So yeah, your numbers probably are the ones I would have thought off, too, with maybe move speed increase thrown in there(+2 while over 100, +1 while under it. Shouldn't be too overpowered, I hope: There's not so much movespeed increasing gear where you can test the values). That would turn the Rabid Rodent("SpuRR", what a nice name for this redesign, isn't it?) into a fragile speedster with ridiculous attack stats, that slowly derange to the point of being useless again. Risk and reward.

I would half it, just like you said. Keeping the increase the same after the buff would be rather contraproductive, because the faster attack speed would kinda counteract to the rapid burnout. Halfing the gain however seems balanced, preventing infinite burnout-states while still rewarding SpuRR-playstyle(0.5 seconds per hit, sounds fair enough).

I only write long posts because I'm often not satisfacted with shorter ones.

Bonus-Paragraph: What is up with all the people here making text-wall jokes? It's not like they expect forums to have text in them or something...

Bad Shakespeare-reference aside: Despite bening so damn powerful if used right, I still think it might be a bit of a punch into the user's face if he still can't craft a 5*-version of it.

However, it can't be buff the sword itself without risking any balance-issues, neither the damage nor the chargeup-rate.

So, what I could suggest is instead of all this, we could turn the disk slightly more powerful and charging. It would not only make the disk a powerful long-range weapon when the bonus is high enough, but it would actually be a great mean of pursuing enemys that have ben flinged a bit far away. This would work great if we'd give the sword a slight chance on stun or just increase its stopping power(the term is made up from another thread by another person: It simply means the chance of letting enemys fall over, like zombies). You could root and damage them on distance so you can run up to them with your sword and batter them a bit more.

Your thoughts on this? I just think that despite all its power, it still needs some sort of upgrade just so that people don't already get the meximum potential of the weapon at the beginning of tier 3.

Other than that, I think we already discussed everything about our new SpuRR-line: The sword slashes have a built-in mechanic now, disks are considered, the charge atta... action is done now, too. Only the stuff about the stars needs some more discussion.

@Klipik: That being said, it's much harder to accumulate a high amount of hits in PVP in a short amount of time. If you have a raging winmillion-user in the other team, it's alone your fault, because building up the boni takes time. Do you play Team Fortress 2? The eyelander is a good example: It's a sword(sword in a first-person shooter. Problem?) that starts out rather... "weak"(it has more attack range than any other melee weapon), but with every enemy you slay with it you get his head that boosts your max health and speed. A sword that lets the users power grow the more it slays... kinda familiar to this here, no? If you have a fully powered knight in the enemy team that is blindingly fast for an explosive specialist(have I mentioned that the class wielding the sword has the most weapons that can cause controlled explosions right in your face?) he may be overpowered...but it's alone your teams'/your fault for being defeated by him, allowing him to grow in power.
So on top of just having a short duration, it feeds alone on your whole teams mistakes. Wanna avoid a supercharged winmillion to fight against? Protect each other. Hey, look at this: All of the sudden the new sword-mechanic increases lockdown-teamwork.

EDIT: Aaaaaand we still forgot something: Does the whole disk-thing only include the Winmillion, or will the Spur and Arc Razor get the projectiles at some percentage, too?