Slightly more explicit list:
Invisible Air: Barrier of the Wind King
A magic that Xaldin witnessed and then copied while on a world that treated its heroes afterlives as little more than a glorified sports competition. Compressing and gyrating the air around a weapon, the wind distorts incoming light, turning it 'invisible.' This invisibility is not perfect: not being a technique properly taught nor invented by Xaldin, he had to cut a few corners and cannot figure out how to put 'more' energy into it - instead of being properly invisible it is instead translucent though not obviously so - moreso a pane of glass than a soap bubble. Additionally, it is not a technique that comes naturally to him - despite his now substantial powers at concentration, he can only maintain six translucent shells every six posts distributed over any number of weapons (aka, one weapon for six turns, or six weapons for one turn or any combination thereof). Still, it is a formidable advantage to have in combat.
Cost: 100 munny (there was an already paid-for ability there, but it was gotten at half-price so...)
Endless Illusion: Brisingamen of Friday
By combining a sheathe of solid air with a controlled application of refracted light, Xaldin has learned how to create solid illusions. Being a rather unimaginative fellow, he has dedicated the entirety of his efforts towards creating extras of his lances. These illusions will shatter at the slightest impact but are until that point are part indistinguishable from the real things: only a fine tuned detection ability
Zero Gear 5: Combo Jump + Combo Air-Slide + Aero something like status effect. Ish.
Endless Illusion: Solid Earth in the Sky, Voices in the Wind, Thoughts in the Air
Xaldin has near complete control of the air around him. He can suppress the sound he makes by suppressing the vibrations in the air - similarly, he can create the illusion of ventriloquism by making the air vibrate in a different place (though he is relatively unskilled at this and is limited to a distance of thirty feet when employing it). He can displace his scent (or erase it by not letting it exceed a certain distance from him) by making the air flow unnaturally about him (but cannot magically create a scent - he has to use raw materials that are physically at his disposal - spice, perfume, etc.).
But by far his greatest achievement is his ability to create 'solid air' for himself. He can freely walk upon air as if it were solid ground and create a foothold or a handhold anywhere he wishes (so long as it is made of air). This takes almost no effort on his part and he can do so as much as he wishes. Its limitations are that it is extremely weak : it cannot be used as a barrier (at best, he can use it as a sort of invisible umbrella) and that it can only support himself (he cannot create a support for another person and cannot support another person while using it). Also, it is
not flight but rather closer to an infinite number of double jumps - he creates platforms and supports wherever he wishes and can fight upon them, greatly enhancing his mobility but he must be mobile in order to do so - cutting off (or breaking) an arm or a leg will vastly reduce his mobility as it would any other grounded person (compare to the fairy dust equip that would allow the user to continue flying).
He can also use it to soften blows, turning the air behind him into a padded, cushiony form. It is a relatively unstable form of protective magic, however, reducing damage taken by only 1/5.
Strong
Passive
Perfect World: A Hundred and Eight Broken Vows
Passive Form
Xaldin has near complete control of the air around him. He can create hurricane-strength gusts with merely a thought and blow people off their feet with but a gesture. During combat this ability manifests itself as incredibly powerful winds that constantly flow from his body. Any enemy caught within a thirty-six feet radius from him find themselves slowed down by a third and using up stamina at three times the normal rate no matter which direction they try to move in. Flying enemies are slowed down by a factor of three (move at 1/3 speed) and use up stamina at nine times the normal rate. Small objects (up to the size and weight of a rock-sized fist) that aren't nailed down are blown away and those who attempt to jump while in Xaldin's presence should not expect to not make the greatest of progress. Xaldin can turn this ability off whenever he desires, though he cannot turn it off and then on during consecutive posts.
Active Form
A fierce enough gust of wind can blow more than the merely physical - it can disperse magic as well. Xaldin has learned this but his bloodlust has made him rather reckless : usually, a magical incantation is employed, or foci or arduous training. Instead, Xaldin has tied this ability directly to his own health - each use of this ability is powered by a ninth of his total lifeforce making it a form of blood magic - for this reason it is incredibly potent but also extremely dangerous.
Using this ability, a super-fast gust of wind travels one-hundred and eight feet and temporarily (for 3 turns) strips away either a positive buff, negative buff or a passive ability of Xaldin's choosing from everyone in range including himself - if this 3 turns exceeds the duration of the buff, the buff is simply dispelled. If defended against by a blocking ability, that blocking ability cannot be used again for six turns or its cool-down, whichever is longer - however, the defender has the choice as to whether the wind affects the shielding ability or the buff/ability that Xaldin had originally targeted. Xaldin cannot target shielding abilities on purpose.
Strong
Passive/Active
RP discount:
Of Talks and Treasure - Active Form first displayed
Dark Wanderer - Passive Form implied to have been used to nudge a sandstorm
Various Combat Threads/Thinking w/ Head threads:
A Fight With Memory - Training Montage
Birth By Sleep - Testing New Recruits
Playtime - Xaldin engages Loz in a fight
Treasure of the Black Fleet - Xaldin engages in a hiring pirates, hiring mercenaries to double-cross their employers and other forms of trickery
Rise again, Number III - Xaldin tricks a grove of nymphs and engages in a battle of wits with Eros
When In Tortuga,
Into the Inky Dark,
Test 432 : A being of light and dark - Engaging in various forms of combat with Dark-Light melds and some Heartless
A Whole New World - Xaldin gets hit by a guitar while in a very whacky world
Long ago and far away - Fighting with ninjas is tricksy business
Data Battle#1 - Xaldin engages in a battle of brute strength with a blue, furry, six-legged alien thing. With rayguns.
Oh Dear... - Xaldin gets smacked around by Namine, Riku's clone and engages in battle with Roxas before the latter screams like a little pansy and runs away
A Graceful night - Xaldin loses rather horrifically to Sora