Helmets and suits protect you from damage and statuses. Shields basically only defend themselves --- although, if your shield is activated and unbroken, then no damage or status touches you at all. Read the wiki page "Shield" or "Shieldbearer Guide" to learn more.

You might do a Google search for something like "immunity fang of vog site:forums.spiralknights.com" (without the quotation marks). I don't think that you can be immune to it. But the way to lessen your damage from fire is to get tons of fire protection on your helmet and suit --- for example, Vog Cub armor with fire unique variants.

@OP

I'll be able to give you an actually valid opinion on FoV use, since I actually used FoV for a bit.

As a bare minimum, 9 pts. of fire res. Will be sufficient to spam charges with. Ive tried up to 16 points, with little gain. Go for 9 points, then focus on ctr and dmg..

Also, unlike what Fehzor said, you will not take next to no damage. You'll find that for some BS reason, if you use FoV charges when actually fighting, youll set yourself on fire 1/3 or 1/2 of the time. However, if you try to set yourself on fire in, say, a mission lobby, you could easily go througb 5-10 charges with no fire. RNGesus can go jump off a cliff. And unless you are solo, you'll mostly need Sear's heart ability to get enough heals to negate the fire damage.

Overall, I would not recommend FoV as an actual weapon. The charge is amazing, but it requires you to build a set completely around it. And when you are down to 5% in an arena with no pills, no remedies, and no emergency revive, you'll be wanting a weapon that isnt a complete piece of garbage.

Get a combuster.

No but 4 seconds of fire and the 4th hit by having VH asi is well worth it if you plan on using the charge.

The status of the FOV is dealt immediately, for a shock version to work (since if shock was dealt immediately it would stop damage dealt) the status would have to be dealt at the end of the charge.

One thing to note is that fire is unique in that it doesn't hinder movement, attacks, or damage dealt; it is basically the best status to have on a self infliction weapon.

Curse would kill you and remove you from battle
Shock would halt all future charges
Freeze sets you up for damage
Poison would weaken the charge
Stun would slow it down and act much like freeze

Alright then. Lets back up some of these claims.

@Octaslash

With +10 fire resistance, I took 11% of my total health (2 fully heated armor pieces and 1 health+6 perk).

So what are the odds of this? About 50/50, maybe a bit more in the favor of taking damage from fire.

Trials:40
Took damage:22
No damage:18

So if the odds of a light are 55%, then you should expect to take about 6.05% of your total health (if you have my same health, ofc) with FoV every hit. Now, I agree with you that it's risky and that in most cases you'd be better off with combuster, but if you're only doing the charge once or twice a level (and you really shouldn't be doing it more than that) then I think it would be affordable, especially when it can accomplish so much damage to a small area in such little time.

@Holy-Nightmare

I cursed myself with gran faust, and then did a fang of vog charge. This knocked me down to 76% from 100%. I was using seraphynx's +6 health perk, and had +10 curse resistance from unique variants, and armor as well as no pure damage bonus on my sword. If a similar weapon was created, I don't think it would be so terrible at all- if you had 4 full weapon slots, you'd have a 1/4 chance of getting cursed and hurting yourself by about 1/4, this ends up with an average health lost of 1/16 * the chance of cursing yourself.. if this curse chance was identical to the fire chance found above, you would end up with a bit under a 1 in 32 chance of taking damage. It would randomly hurt you massively, but in the end wouldn't be that big of a deal provided you resisted it and planned accordingly.

If the curse variant of FoV did elemental damage, I could see it being the best possible combination as it would be capable of dealing with the harder gremlins- menders and demos, as well as all manner of constructs, slimes, turrets and undead.