Heavy piercing sword

I have been having pretty minor ideas on having a heavy piercing sword added to the game. Every other damage type has a heavy sword; Triglav for normal, Gran F. for shadow and DA for elemental but nothing for piercing. I would love to see a Piercing variant for one of the heavies. The amount of piercing type swords are lacking as well - the only ones being the 3 flourishes.
I just brainstormed some ideas of how the sword would look like. It would look a bit like a Khorovod mixed with the shape of a node slime crusher (however without the "slime" look) with small teeth going down the edges. (not literal teeth, but very small spikes/grooves if you get the idea) Now, after picturing that sword, add on a patch of fur running down the middle embroiled with jewels and tooth necklaces, which could possibly move and jiggle around as you slash. I also don't want this sword to look like a piece of the Snarby set. I was thinking more along the lines of the Skolver set.
The charge would shoot out 1/2/5 (unsure on this part - want the number to differ from the GF/DA) thorn-like teeth (or something along those lines, just has to be pointy) that snake in a straight trajectory and have pale yellow lines that follow the projectile in a helix fashion as the projectile spins around. The projectile would travel pretty much the same speed as the gran faust/avenger.
The basic attack would have pretty much the same 2 hit sword style and look; just recolored to match the overall color and theme of the sword. Maybe a wolver noise after the second strike? Not sure.
I would make a picture but it kind of seems like a bit of a waste since this idea may get pretty bad receptions (it is a pretty big addition to the game after all) but anyway, hopefully this idea will get some good reception/critique. I, myself, have mixed feelings about how this sword will work out.

Chromas, and Gorgos (maybe even trojans if you have good teamwork) would be the target of this weapon not really the fast enemies. Plus a fun sword to use in Vana Phase 1.

@Fangel: "A heavy piercing sword needs to have more piercing and less blunt trauma."
Incorrect. A heavy piercing sword is, by its own definition of heavy, going to have greater mass on top of its perforating abilities to deal greater damage. A lance, as it has been long requested and discussed, is the ideal image of that philosophy.
Normal damage has consistently (for the most part) been an indicator of a weapon's capacity for applied mass on a target (or simply a gear's implied mass at all, from the bulky Ancient Plate Mail or Volcanic Plate Mail to the lightweight Dragon Scale Mail or Radiant Silvermail). A Flourish could never dent an enemy by its mass alone, it requires its elongated blade to open wounds from without and deliver damage from within. A heavy piercing weapon can and will excel at both methods but will exert its weight to do so, therefore such a weapon should provide Normal/Piercing.
As for Cozmar's ongoing idea for a toothed sword being a heavy piercing weapon, it reminisces me of the blades made of shark teeth. If merely for the sake of complimenting a set of a Megalodon Mask and a Deep Sea Cuirass with it, I give it my support, only without the Wolver cry.

A Gremlin Saw from Gremlin Recons would fit my petité.

They show quite clearly to inflict normal damage, however.

I don't think a heavy sword with piercing damage tacked onto it really feels like a piercing weapon. Then again, with the upcoming gunner update, the idea of piercing weapons actually doing piercing things is going to be flying out the window, so I guess that's not a valid argument anymore.
Flourish is essentially a heavy sword that does pure piercing but with no knockback on its first hit. Piercing weapons have a severe lack of knockback on just about every piercing weapon(off the top of my head, the only piercing weapons with knockback are callahan and savage tortofist). This is sort of a trend that would be nice to continue.
Plus a split piercing-normal sword just sort of falls into the same level of OP that all split-damage swords fall into. It would be fun to have another sword like the rocket hammer that is really good at what it does but takes a fair amount of risk.

@Fangel: "I don't think a heavy sword with piercing damage tacked onto it really feels like a piercing weapon."
It is if the movements are made for the purpose of piercing, such as jabs or stabs. Besides, if a Wolver bite and a poking Chromalisk tongue are effective enough for piercing, a slab of iron full of jagged spikes used for slamming into an enemy are fair game a-plenty. I do understand that the normal heavy swings would be out-of-trait involving piercing damage, so instead the attacks would involve downward slams into the ground, as if biting the enemy using the sword as the upper jaw.
"Flourish is essentially a heavy sword that does pure piercing but with no knockback on its first hit."
This is only accountable for the reach of the first part of its attack combo, which is also widely exploited with shield-cancelling to vivid effects. However, since the cutting stroke is a legitimate fencing technique, getting rid of it for the sake of proper piercing would be much more arbitrary than it is necessary (if at all) and may risk alienating the playerbase accustomed to it. Then again, the Flourish is a lightweight armament, which justifies the lack of knockback to begin with.
"It would be fun to have another sword like the rocket hammer that is really good at what it does but takes a fair amount of risk."
Good point. Taking back my example of the toothed broadsword from two quotations back, I suggest the swings would be fairly swift (about as fast as a Calibur or Brandish, should at least be considered as a more lightweight Troika), but require a short delay after each attack in order to pull the blade from the ground and regain mobility. This also means that the attacks would be long-ranged but lacking the broad range of heavy swords or the Flourish's combo starter. I also suggest angling the swings in slight diagonal arcs (maybe 45°-35° from the vertical axis) to put it between the range of a Calibur and a Troika instead of covering a paper-thin line of reach.
A heavy piercing sword needs to have more piercing and less blunt trauma. Adding spikes to a heavy sword doesn't make it just stop being a heavy sword.
In my eyes, we have two versions of piercing-like attacks right now: Stab and slice. Stabbing is the two attacks after the first of a flourish, with a slice being the first swing. For a heavy sword, we can have a strong stab (thrust the sword forwards into the enemy), and then slice upwards. This could be a strong single-target-damaging sword.
If you want piercing and crowd control, I don't think that's the best idea. Both enemies weak to pierce are always all over the place, so single-target swords seem to be the best way to deal with them.