Sekki: Years after dying, Dyayun was approached by a mute, white haired man, whom - in an abnormally deep voice - called himself Joseph. Joseph promised to return him to life, as well as take him to a new teacher, one that could teach him a new move - one that would surely give him the edge over Tre'Yan. He hadn't asked for anything in return, but Dyayun knew there had to be a catch. He agreed anyway. Vengeance often overruled personal safety.
The teacher he had been promised, was a deceased boxer known as Alexandro 'The Hunter' Cabnaro. The Hunter had been one of the world's foremost defensive boxers in the known giga-verses, winning titles all over the known existence with simple techniques, godly basics, and what some considered just a hint of magic. The man evidently owed Joseph a favor and thus would teach him just that hint of magic.
Hunter was appallingly vicious in the ring for a defensive fighter, his counter punches alone had often stopped Dyayun dead in his tracks, nearly killing the dead man each time. Dyayun still didn't respect counter punching, or defensive boxers in general, but he had to begrudgingly admit - fighting the Hunter hurt.
Finally, Hunter decided to teach him what he called Sekki, also known as Bloodlust. It was essentially a feint that, after the opponent experiences the pinnacle of power of the opponent, makes the opponent think that another such punch is coming. Once they do, they're more likely to defend or try and counter, leaving them open to a devestating counter and potential knock out.
Dyayun took to it like a fish in water, quickly coming to master the technique.
Speed Hell: After dying, Tre'Yan was granted the chance to compete in an Undead Boxing tournament, hosted by a creature named Liaison, who claimed he couldn't be touched. Tre'Yan faced opponents from all over existence, including men that owuld be in higher weight classes than him, by far. The point of the tournament was that Liaison had grown found of boxing, after watching a particularly vicious fight between the American Bryan Hawk and the Japanese Takamura.
The prize wasn't money nor fame, but a granted wish from Liaison who would call in any number of favors to grant it. Tre'Yan made it to the final round with all knockouts, and had been knocked down only once. The final round was particularly dangerous, as his opponent was a mirror image of Dyayun, but lacked the power and rough grace of the man. Still, he hit like a truck and nearly knocked Tre'Yan out twice.
Eventually Tre'Yan won with a very sharp, crisp one-two punch that he had finally perfected. He wished for more speed, and was granted it. In a roundabout way. Liaison sent him off to meet the legendary boxer of Ghurth giga-multiverse, a man by the name of Gufth "Speed Hell" Xumi, the distant cousin of their current Presidentess, Shangrul Xumi. The man was nice, and talked a lot about his past bouts, especially ones with a man he referred to as 'The Hunter'.
Gurth oft wore thick padding, even in the admittedly high heat of the day - several hundred degrees above zero was considered a cool day, and a thousand flat was considered mildly warm. When finally getting down to what Tre'Yan had come for, he constructed a ring and went about boxing Tre'Yan.
Now, Tre'Yan was a fast man, and started out fine - even surpising Gufth with his acceleration. Eventually, however, he was starting to get left behind by Gufth, to the point where he could not even defend against the shots that were seemingly coming from everywhere. For five years this went on, with Tre'Yan steadily getting faster, or rather, his body reacting faster. When he finally overcame Gufth, the man revealed beneath his attire was several thousand pounds of weights.
Tre'Yan, shocked as he were, realized how outclassed he was - but fortunately, didn't have to box the man without weights. The man started teaching him what was known as 'Speed Hell', a technique that accelerated the body to a high level of speed, that seemed to spawn after images of the user that appear around the opponent, making incoming hits unpredictable. It starts by moving a full speed from side to side, while throwing as many feints as possible. With his natural hand and foot speed, Tre'Yan was able to master the technique.
--
So I took the time to update their magics, though you don't have to use Speed Hell if you don't want too.