Blayze: The infernal Saint
A human ki practitioner who has attempted to ascend to immortality and godhood by bathing in the hottest magma, blayze was instead cursed by a mysterious entity within the magma; he is now immortal, but he has lost his regular human body and is confined to a magma body.
Passive part 1: molten rock: blayze absorbs the excess heat energy from everything happening nearby him, converting it to infernal ki: nearby attacks and spells (including by himself) will cause him to heat up significantly faster. His auto attack damage, base attack speed, and his movement speed are all based on the heat he absorbs. However, he takes less damage when he has less heat (as he is hardened).
Passive part 2: conservation of energy: blayze can switch to melee combat if the target gets close enough, dealing sinificantly increased damage. Furthermore, while blayze has a large attack range (700) his damage rapidly falls off past 550 attack range, and increases below 350 and 150.
Q: Store heat: Blayze will consume his heat, and any nearby heat while this is channeling. He can channel indefinitely, though he will absorb less heat past certain points, he will change colors from glowing red, to white, to blue, to purple, and, if somehow crazy enough to charge that long, outright shimmering (colorless, but the air around him will warp). While channeling, he is slowed, and deals less damage with his auto attacks. If an enemy champion cancels his channel, he will take damage and have 40% of the stores heat dispelled.
Q: part 2: heat blast (ahem falcon punch): double tapping Q in one spot will release all the heat into a huge attack, with damage falling off with distance and up close damage being extremely powerful. Part of the damage will be lost to recharge your passive, unless you have your passive fully charged in the first place.
W: Heat Sink: absorb all the heat from a small target area, charging your passive/Q and freezing (stunning) all enemies within the the area. Damaging enemies with your attacks afterwards will result in a loss of armor until they regain their heat (heat is regained over time, their being attacked will speed up heat gain).
E: Emblazen: Ignite your heat energy, dealing damage per second near you, as well as giving all your auto attacks bonus damage and aoe, keeping the bonus damage, attack speed, and movement speed from your passive until toggled off. You lose heat energy over time, and deal damage to yourself over time as well; Emblazen will automatically turn off if Blayze runs out of infernal ki.
R: Infernal Hell: after an uninterruptible channel for 1.5 seconds, Blayze smashes the ground, turning it into a hotspot with a huge inferno burning around him. Damage dealt to units by Blayze extends the duration of this inferno, (burning the units as fuel for more burning). Blayze also forms flaming wings (think flaming bat wings: symbol of his attempt at godhood), allowing him to reactivate R to dash around within the inferno. Blayze cannot be forced to leave this burning region by crowd control, however if he does leave the flames will disappear within 1 second.
I put a lot more thought than I was planning into this, hope you like it (also pls consider it Riot hehe, no need for credit or monies, though I wouldn't mind a job mehehehe).