I liked the selection very much, I just stumbled upon it when scouring around the wiki as usual and I noted Cryoshell was in there. I barely know any of there songs but I know even less people who know Cryoshell in general.
Adding an introduction to every champion article wouldn't be easy, however. I had to rewrite Aatrox's introduction several times since it was too subjective, which Shaw pointed out early on as you might know. The easiest part would be summarizing a champion's abilities; but the harder part would be implying play-style. I see it like this way: you can read the champion's abilities easily enough, but you might not know how to apply them as they're intended. But we can't dump the Strategy page on the main article either. There would need to be a careful balance.
It would help to clarify what you mean by "implying" playstyle. If you mean suggesting builds and positions, then that's something better left for Strategy, but if you just want to indicate what makes the champion special and what they contribute to teams, then that should be fine.
The wielder of the gauntlet that makes a pair with Ezreal's.
His visual theme is currently "phantom limb" - invisible body parts that are wrapped in bandages to signify their boundaries.
My first thought was that while obtaining the gauntlet he horrifically disfigured to the point of near-death, but that the gauntlet is keeping him alive by manifesting the phantom body to hold him together (his death animation has the gauntlet flying off, causing his bust/torso to fall to the floor with bandages crumpling around him; his hand outstretching then falling limp). I then thought of a less gruesome alternative where the gauntlet was drawing matter from him to create the spells, either a decision on his part to amplify the power or as a side-effect of using the gauntlet. The latter raises some issues with Ezreal (since he's in one piece), but I thought something along the lines of Scar's (Fullmetal Alchemist) left and right arms — my champion deconstructs and Ezreal constructs. My champion is destroying himself as he casts his abilities - his goal to obtain the other gauntlet before he runs out of self.
But I'm open for directions, and even visual cues.
Azazel was his placeholder name, although I'm becoming attached to it.
Health wouldn't really work due to the spammable nature of his kit - unless the costs weren't meaningful, which would defeat the point of health costs. He'd also need a heal somewhere, since all health-cost champions have a sustain tool. I suppose I could a substantial health cost on his power-ramping ability, so it's like he's converting his health into power-ramping stacks (making him incredibly vulnerable at full power), but then have him heal it all back when he dispells the stacks. His enemy could then aim to silence him when his stacks around about to run out to prevent him healing, since the health would be lost if they time-out by themselves?
I think tying in his arcane body to his mana pool works too, though.