You enter one of the dozens of sparring chambers within the Shadow Academy of Lyspair, the simple square room utilized mostly by those learning the ways of the lightsaber. This five hundred square-foot room, rectangular in shape, is nearly barren. The floor is lined with simple padding, while the walls are made of dull, grey durasteel, gauged by innumerable lightsaber strikes, scarring the metal permanently.
The ceiling towers above you, nearly twenty feet in height, allowing for plenty of movement from the more acrobatic of Force users. There are no other adornments within the room, save for the entrance and lighting that bathes the entire room, yet seems to come from nowhere. All corners of the room are perfectly lit, with no visible shadows to speak of. There is nowhere for you to hide within the room, but… there's no room for your opponent to hide either.
The thin air on the Moon had started to take its toll on the two Sith, who were slightly drained of physical strength as a result of no breathing apparatus available during the duel.
Huh? They are inside the Shadow Academy, and the room would be ventilated, gravity regulated, and have plenty of oxygen in it. You have the first post, so there is no reason for either of you to be "drained of physical strength"
s/he conjured a barrier against the force around hirself.
Always capitalize the Force so we know if you are referencing a force of nature or the mystical power we call "the Force". Also, Kz'set does not have the Force Power: "Barrier". Not sure how he wold throw one up. There is no indication of Kz'set having a powerful Resolve either (only a +1) so it's not like he is preparing himself for a mental attack. No other feats give merit to what was described here.
...leg was caught by the tip of his master's saber, leaving a large gash down it.
If you actually got cut in the leg with a lightsaber, you're not really going to be able to do much for the rest of the fight. I know it's a short fight, but inflicting a lightsaber gash in your first post, even on yourself, is a bit much.