Soo...Now, to change my reputation once and for all =] Short Reply incomingGoodie, that was one of my favourite fire jutsus :"p
Moving on.
(Katon: Keshi Makuga Hara) - Fire Release: Exploding Flame Crater
Rank: A
Type: Offense
Range: Long
Chakra Cost: 30
Damage Points: 60
Description: The user first stomps on the ground, making an underground tunnel form between themselves and the opponent. They then breathe out fire into the tunnel, causing the fire to turn into lava as it travels. With a single hand seal, the lava will erupt from the ground underneath the opponent, engulfing them in lava.
First, stomp onto the ground to create an underground tunnel between yourself and the opponent. Then focus your fire chakra and channel it into your mouth where after you will breathe it out into the tunnel. On its way through the tunnel the fire will turn into lava, and when it reaches the opponent you can make it erupt from the ground using one single handseal *shows you handseal*, engulfing the opponent in lava.
While focusing a huge amount of chakra within my body in which I flow and circulate throughout, I regulate my breathing, taking deep breaths, calming my nerves and soothing my mind. As I reach a state of complete silence, of complete concentration, where no trivial disturbances could affect my peaceful posture and thoughts, I lift my right leg up into the air. Once done, i stomp it down upon the ground below my leg, with great force, in which I pave the way, creating a tunnel that leads from the hole in which the leg I stomped down with caused, and it burrows all the way, until directly under you. It forms a tunnel that connects us via the underground route. Gathering the huge entity of chakra into the center of my chest, I slowly, but surely, heat my chakra up intensely, in which I incorporate the burning and combustive, once again, into my chakra. As the heat from my chakra accentuates indefinitely, I bend down, molding my Katon Chakra, inhaling some air, as my mouth is somewhat close to the hole. Subsequently, I expel the flames I molded in my lungs, into the hole itself, travelling in the set route course that it will journey with the tunnel I created. As the intense flames travel through the underground, it heats up the soil and rock particles underground, turning into lava soon as it passes, glowing a dark-crimson shade, evidently visible at the light surface. As it traverses the cavernous tunnel, converging ever upon you in a thick liquid form - that being lava, rushing menacingly towards your clone's bottoms. Once the lava conspicuously gathers beneath you, performing a single hand seal, I manipulate the lava, in which infused with my chakra, to erupt from the ground in the form of a geyser like thingy, from beneath vertically upwards, uprising and engulfing your clone in lava, burning him to a crisp.
Advantages & Disadvantages
Given the fact it reaches up to long-range, it is versatile, and can be used in many situations. It can practically hit the opponent from all ranges, anywhere, but the problem is, once the tunnel is created, the flames must flow through that path, and as such, the opponent can simply move away from the range in which the lava erupts, with ample time to respond, and completely dodge it, with still spare time to attack. That is one of the major weaknesses of this technique. You need to maintain chakra control until the last moment, since you have to perform a hand seal, and thus you can get distracted. The opponent can dodge and attack quickly, leaving you on the defensive end. Also, it would be rather safe to assume, that this technique, does not take the shortest amount of time to be completed. I would judge this as a few whole seconds, definitely more. It'll take so long, that the opponent can drink some tea, before responding; But of course, that is an exaggeration.
To be honest, since this technique goes in one direction, underneath the opponent and going upwards, the opponent might try to dodge, as such I can make something collapse upon him, probably summoning something like Bedrock Coffin to trap him whist he tries to block the lava erupting, or I could use Antlion, sucking him into the epicenter, dragging him down to be suffocated. Subsequently, creating a tunnel leading to the space beneath the antlion could prove fatal. The lava would completely engulf and kill them brutally. To defend, I would simply punch myself away using Hurricane Fist, or just somehow propel myself away.
Should be short enough so my reputation drops.