6AM and wallies do not go well together. xDSo to begin with I'll first mold spiritual and physical energy together to create raw chakra. I will heat this raw chakra up in my lungs through the use of nature transformation creating katon chakra. Then I will expel this chakra from my mouth creating a stream of fire capable of reaching up to mid range.
So I'll begin with advantages. Like the D-Rank streams this follows the same idea. It is released as a stream of fire from your mouth and can reach mid range. It is capable of being very fast in usage as it doesn't require hand seals and it can be directed with your head in any direction. The first noticeable trait I saw was the description about causing a target to collapse due to the heat. This immediately makes me think of all the possible combinations one could make with this. Before I list some out I'll list out some very basic and obvious advantages to using this technique. It's larger than a D-Rank stream which makes it deadlier and harder to avoid. As with other fire techniques the technique is still fire and can burn very extremely well making it useful. Since it is a stream one could use it on a water source to make a non chakra filled steam which would allow a dojutsu user to still see in it yet it would blind the enemy due to still being steam. Normally with Hiding in Mist jutsu the dojutsu user is blinded (except Byakugan users) because it is a blanket of chakra...not only because it is mist. The mist is infused with chakra and thus blinds the Sharingan/Rinnegan user.
For disadvantages I'll begin with the fact that it is a stream. So unlike the previous jutsu we learned where one could use it in close range to shoot fireballs to aid with taijutsu this technique can't be used like that. It is a stream technique and as such we can't use techniques simultaneously unless we have a clone on the field capable of doing this. To compensate for the stream disadvantage (other than using a clone) one would want to use a technique before hand to combine this with (such as the tornadoes you mentioned) or another fuuton. The stream won't be large enough to conceal your position behind it or anything like that.
So the coolest part about this jutsu was that it mentioned heat exhaustion. I initially just assumed that all katons did this up close. So first I have a question. Do they all carry this effect when used up close (the higher ranked ones)? But regardless I'll just focus on this one for this instance. So if I use a doton to surround my enemy and box them in I can use this katon in close range. So fire naturally sucks up oxygen to feed it. In close range this will cause heat exhaustion and eventually knock an opponent out if I don't directly burn them. Now it is difficult to pull this off as they can just use a suiton. However if I paralyze them with a raiton or bind them with some other jutsu I can make it extremely difficult for them to form hand seals.
Yes, very good I must admit. Most detailed and thorough replies I've seen so far. And what's most important you pretty much get everything right so there's not really much I can say or add.
Yes, pretty much. I mean, that's something you do "freeform" with your description of techniques even if their own descriptions don't really say that. These type of things apply logically and if you can use them, why not? Fire is hot and as such it will put a strain on the opponent. There's a lot of stuff that can be done additionally in your descriptions and just knowing how to properly use techniques doesn't make a good RPer. A good RPer will also know how to properly manipulate the descriptions and use the words as the weapon.