*grabs a scroll that he held on his back*
He unfolds it and puts it onto the ground in front of himsels and immediately starts gathering Fire Release chakra in his left palm. He collects a great amount of chakra because he's about to perform a very complicated technique by its rank. Once he's finishes, he quickly slams with his hand onto the scroll and at the same moment, he release the fire chakra that he's channeled into the scroll. With the help of his chakra, he summons a giant amount of fire. But he swiftly take control over it and forms it into a massive tiger that starts running towards a nearby tree. The tiger is very big and fast and he (the user) has an easy control over its movements. The tiger succesfully gets to its target and attaches itself to the tree and in the next moment, it explodes on destroying that tree and all of the trees that were close to it. The explosion also scatters flames all around the place.
Combinations you could make with this jutsu: Something came to my mind accidentally and I think it could be quite a tricky and cool move. Once I release the tiger and it manages to get close-range to my opponent somehow (I could even work it out with mid-range) and then my opponent would use water to defend as the most logical and mainstream way. Then, I would create a pillar in front of the tiger, by using a simple Earth Release Technique and make the tiger attack to it and explode. This might not always touch or hurt my opponent in any ways but will surely create an opponening for me, while he/she is stunned and his/her vision is blocked by the explosion.
Ways to Counter: It's not hard to defend from this, as long as you don't let it come too close to you. That's because the explosion that is created is pretty massive and if it explodes close to you, no matter if you pull out a Water Style: Water Encampment Wall that is right in front of you, it still might not be the perfect soulution. That's why it's important to get rid of the tiger by a water technique that is of a great rank and can create multiple waves os similar in front of the user to also make the agility of the tiger useless. I was thinking the S-rnak technique Water Release: Water Encampment Pillar.
Uses of this technique (Battle orientated and non-battle orientated): I would use it only if I would create a distraction for my opponent by performing a certain technique or making my opponent fall into a trap, to allow me to use the open the scroll properly. It could be only creating clone/s or doing a rather serious and complicated technique, all depending on my opponent skills. But I would definetely have to give myself proper amount of time. This is very risky, though, and I would probably avoid perfrming this technique.
Rate the technique out of ten: This technique gets a 6/10 from me because of the following; the technique's power is undoubtedly great and can cause massive damage but what makes an S-rank technique having suck a low number are the facts that it requires a scroll and thus takes a hell of a lot of time to be performed, the tiger has to attack to the target and the opponent has plenty of time to figure someting out before it comes to him/her. Oh, and I've almost forgoten, it's S-rank, that's at least 1 point less.
Questions about the technique (Optional): N/A
*creates a clone that stands close to him*
He starts collecting Fire Release chakra in his lungs and at the same time, his clone starts gathering Wind Release chakra in the same place. When he finds the quantity of the chakra to be enough, he rapidly starts transfering the chakra towards his gullet and beyond. After a short time, the chakra gets to the end of his mouth. At the same moment when chakra gets there, he starts releasing the chakra out of his mouth. As soon as the chakra is leaving, he starts forming it into a small ball with a giant temeparure and distructiveness. While he's doing that, his clone finishes channeling chakra and starts transporting Wind Release chakra towards the end of it's mouth. At one moment, both he and the clone have the chakra ready to be released and the do create the techniques at the same time. He shot the previously mentioned ball and the clone shoots an amazingly powerful wide wind. Once that those two touch eachother after a short amount of time, they create a giant fire stream, one of the biggets that he has ever created or even seen. That fire blast destroys everything withing his range of sight.
Combinations you could make with this jutsu: I would definitely not combine this technique with anything that would mix with it because it's really not necesarry. The power of the technique is already S-rank and as the rules say, by adding as much of power to it as you can, it would still remain S-rnak. That's why some distraction earth techniques could serve well to be combined with this technique to allow oyu to properly perform it and possibly create a clone.
Ways to Counter: As you've said, no matter how powerful and how powerful the technique soulds and in reality should be, it is still an S-ranke dtechnique. Period. And that means that any water techniques of A-rank would defeat it in out RP. This is also one of the things that makes this technique a bit undesirable. I could use the classical Water Style: Water Encampment Wall, if I have water mastery and a water source, Water Style: Giant Water Vortex Technique, etc. (There's still Water Style: Typhoon Water Vortex, the counter used in the manga which has similar properties as this fire technique)
Uses of this technique (Battle orientated and non-battle orientated): The uses of this technique are; kill, destroy, burn to ash. It is a technique that would destroy anything on it's way in many cases and that's really mainstream. It would be a noobish move to use this technique for real but it would also be cool to use it against someone whose attack was really straightforward to to mock him/her in a way. In Naruto it would be battle-winning, here it's "I have no idea what to do, let's use this already made combo to spam"
Rate the technique out of ten: I give this technique a 8/10. This is alongside the two Gokka's, the most powerful Fire Release techniquea and one of the post powerful techniques at all. But unfortunately it has a big diadvantage that two of those don't have, it requires an ally or a clone to be created. Now, this doesn't have to be a disadvantage all the time because sometimes you don't have to create a clone afterwards but you already have it. Still, this makes it a bit unnatractive and combined with it being S-rank, it results in the mentioned grade.
Questions about the technique (Optional): N/A