The lovely thing about the Serpentine Manipulation was, even trivial amounts of blood, provided it was oxygenated, could lead to relatively decent levels of flames thanks to the oxygen particles being more condensed in a liquid versus their traditional state of being spread apart within the air. However, it was true: the downside to this expression of the technique, was that very quickly, Barsait would grow fatigued. And if he decided to keep up the "pace," so to speak, for too long - bleeding to death was not an impossibility. It all boiled down to attempting to ignite the outer layer of blood at an interval to maximize overall produced embers with as little precious life-preserving liquid sacrificed as possible; thanks to the abundance of H2O present, this was in fact easier to maintain than usual - a plus for the swordsman.
The clock was ticking down like a heavy pendulum. They only had moments left.. if it went any further at the rate it had been, neither fighter would get a definitive "finish." Instead, the judges would rate them based on technique, damage inflicted, the manner in which they acted, and basic 'style points,' if one would. With the two fighters in such close proximity of each others' finishing strikes.. it was like two hunters marking one another as prey and only a limited amount of time in which either could take the kill before it would be for naught. It was maddening enough in normal conditions, let alone for Omi whom was currently seething beneath the skin both in heat and anger.
However, at roughly 6' from his opponent, the lumbering berserker.. stopped. Not once had Barsait taken his eyes off his opponent; the odd masses shifting here and there had not gone unnoticed, what precious little was unfortunately visible. However, the truth of the matter was.. it was too late. For either of them. Both were well in the other fighter's metaphorical "traps," whether each knew it or not; the only thing that would prevent their executions was if the arena's bell sounded first, and Omi or Ryu were too late. But no doubt, Ryu wouldn't settle for that.. and there was no mistake in that frenzy-filled expression on Barsait's face: neither would he.
[*CURRENT*]
And they were off. Ryu broke free of his paper-thin act of retreating, instead dashing forward with a blade glistening across the frost; Ryu had taken the initiative. However, it was unlikely the red-headed fighter would realize as the katana honed in to reach a point of striking: he'd be getting assistance in reaching his destination.

"Too late!!"
Finally, the mainstay of his plan would be usable! Omi Barsait had been allowing his opponent all of the time in the world he could afford, in the hopes Ryu would build up a fiercesome attack of some sort. Enough, Ryu could then find the confidence to charge Omi.. it wasn't clear whether Ryu had achieved this end of the plan, but rushing a man of flames head on as he had, there was considerable little doubt the enemy fighter had an arsenal ready. The overall strategy the swordsman had been hoping would work, went without a hitch.. no, to be more precise, it went better than expected, almost eerily so.
[Phase I]: "Use his force to accelerate my own." As Barsait spotted Ryu tear off towards the mercenary, Barsait fiercely expanded his eyes - a signal to a group of his crimson 'extensions;' the clusters of serpents below the grounds some three, growing to four feet behind Ryu's initial position then roared through the frost, screaming concussive, hydrogen-accelerated flames to Ryu's back. There was no doubt this could hurt Ryu.. but the true purpose was to take advantage of the explosive effects to bring Ryu towards Barsait faster. Ryu would find his dash became much more effective than perhaps anticipated, covering the 6' even faster than originally intended.
[Phase II]: "Feign slowness until he takes the bait." All this time, the swordsman had been lumbering forward at a very slow, menacing pace. In truth.. this was a show. In no way did the manipulation somehow "weigh" him down via the flames. If anything, thanks to losing moisture and no doubt a nice portion of body mass, not to mention articles of clothing and gear - it freed his body up considerably. Then, one had to take into account, he was practically devouring every bit of moisture ahead of him in an effort to assimilate it into his flaming arsenals; the air resistance directly ahead would be lowered. Finally, thanks to losing moisture from his actual body rather fast, Barsait would naturally and hopefully, temporarily go into a "dry spell" where his senses were heightened as the body clamored for water. Perhaps the only reason he hadn't ran forward at faster speeds than his norm, was that the flames may've lagged behind him; not a concern now that Ryu and Omi were so close, however. Thus, when Ryu made his run forward.. so did Omi.
[Phase III]: "Guarantee collision." 6 feet was very little distance to cover to begin with. But now, Ryu and Omi were going to clash at a much, much faster rate; what would've taken seconds would now likely be damned near instantaneous. This would make Ryu's slash from a lower position upward unwise, since the mercenary's body would long prior block it on the ascension; however.. the interesting thing was: the flames directly in front of Omi, what would've made some friction or resistance against the blade.. had parted. The truth of the matter was - whether that blade held a fiercesome trick or no, Barsait allowed it to stall on or even in his body. Meaning Ryu and Omi would literally pressed against one another; likely, they could even smell one another's breaths, ideally.
[Phase IV]: "*Ensnare and.. EXECUTE!!*"

The aforementioned sword of Barsait's, hanging limply behind his back, was turned during the course of his dash.. so when the two fighter's met - it only had one resolve. It was difficult, really - the swordsman could neither turn to make sure his action was 100% accurate, nor could he guess the precision of the stab. But what he had done, was purposely let some of the flames burn him at a certain point on his mid-back, as a sort of "target" which he could roughly estimate a stab at.
Omi chose the point the two fighters met to make the sword's true use realizable. For with a great outcry of confusion and shock from the stands.. the blade plunged into his own body.
Through the back and out the region right below the ribs, the super-heated blade passed through his body and even the chain mesh without incident; slamming furiously into the same, rough region on Ryu's body. Two blades, Ryu's and Omi's, intersected eachother now - as Barsait attempted to "hug" Ryu closer in order to further ensnare him, although this was practically overkill, now. The super-heated blade could likely melt rock; so it was curious, though Omi knew of them not: How would it, surging with flames from Barsait's own open wound, greet Ryu's exterior if it struck with great force?
As if this wasn't enough, the swordsman had let loose all of his careful control on the many flames about him; contracting them and furiously commanding every serpent's "load" to dilate and wash over Ryu and Omi. Every bit of moisture nearby he could ignite into an explosive force, the swordsman did without a second thought; it was a horrifying onslaught of offensive might, without any consideration for his own well-being whatsoever.
Needless to say, as Ryu would more than likely attempt to counter this best he can - many "BOOM!!!"(s) resonated all about the two as they would stand in the near-middle of the arena grounds like a marvelous yet horrifying torch, contradicting the icy, barren world abound.