Champion Idea:Krint
Krint The Heart of the Void
Pronounced kʊ•rɪnθ
Attack Type: Melee Role: AP Assassin Lane: Jungle Gender: Undefined Faction: Celestial Race: Voidborn Secondary Bar: Respite (uses health for abilities)
Aesthetics I'm a really bad artist so you're going to have to use your imagination. It is an amorphous being made of a black goop that looks like space. It typically takes the shape of a horse. In Agile Mode it looks like a horse with a dragon's head and a large unicorn horn that splits into two smaller moose antlers with a floating orb in the center. The orb is black and has white specks on it like stars. It has the tail of a lion and the end is lit with a black flame. Its skin is pitch black, its mane is made of black fire. Its eyes are bright white with a slight yellowish tint. Its feet look like Ao Shin's (or any other Asian dragon.) Upon entering Aggressive Mode, its orb grows a little and the white specks fade away. Its body gains white specks and gets a dark blueish tint (so it looks like space). Its eyes blaze like fire and gain a bluish tint. Its mane and the flame at the end of its tail grow brighter and turn white. its claws glow white too. It floats around instead of walking and for its auto-attacks it bites at enemies with sharp fangs that form when it opens its mouth. Its sound effects are like Bard's but more ominous and dark. Its joke makes Its antlers grow into a giant tree and its orb becomes leaves. Its taunt makes its orb come out of its antler cage and transforms into a little planet, resembling Earth. The planet then starts to burn until it disappears. Its dance makes it fly around in circles like Bar's taunt, but without a horn. Its laugh makes a loud laughing sound with the same volume across the map. It doesn't move while laughing. (Inspired by the Qilin/Kirin, a Chinese/Japanese myth)
Debut Skin: Atlantean Krint: His body is now made of water and he has little fish swimming in him instead of stars.
Base Stats Health: 547.4 (+85 per level) Health Regen per 5 seconds: 7.35 (+0.6 per level) Attack Damage: 53.7 (+2.875 per level) Attack Speed: 0.625 (+2.5%) Armor: 27 (+3.25 per level) Magic Resist: 32.1 (+1.25 per level) Movement Speed: 355
Passive: Ansuz
Agile Mode: Whenever Krint hits a champion or large monster, a mark appears on the opposite side (like Fiora's vital). When the mark is hit reduces all cooldowns by 1 second and does more damage. After 5 seconds of stealth or not having an enemy champion in range of its abilities it switches to Aggressive Mode, gaining new abilities and a new passive.
Angle: 90° Side: 180° around impact of damaging ability
Aggressive Mode: Whenever Krint casts a spell it spawns a little star that gives vision. After 5 seconds of having a visible enemy champion in range of any of its abilities it switches to Agile Mode, gaining new abilities and a new passive.
Sight Radius: 220 Ward Health: 3 Duration: 30 + level seconds Limit: 1 + (level/2)
For both: Upon getting a kill or assist, gains a stack of Respite. Each stack gives 3% movement speed in Agile Mode, and 2% AP and AD in Aggressive Mode. Up to 3 stacks.
Q: Laguz/Kenaz
Agile Mode: Krint opens its mouth and spits out a glob of his goop. When it hits an enemy, Krint forms out of the goop onto the backside of the enemy, teleporting to them. It does more damage the farther they are.
Type: Collision Skillshot + Blink Range: 1075 units Cost: 5% current health CD: 9 seconds Minimum Magic Damage: 15/25/35/45/55 (+15% AP) Distance Scaling Damage: 1% more damage per 9 units after passing 400 units (up to 100% more damage) Maximum Magic Damage: 30/50/70/90/110 (+30% AP)
Aggressive Mode: Shoots its ball out, splitting the fabric of reality as it travels and dealing magic damage. After it reaches the end of its path it comes back to Krint like a boomerang. Deals more damage the closer the enemy is.
Type: Pass-Through Skillshot Range: 1075 Cost: 5% current health CD: 11/10/9/8/7 seconds Maximum Magic Damage: 60/105/150/195/240 (+60% AP) Distance Scaling Damage: 1% less damage (after scaling) per 13.5 units after passing 400 units (up to 50% less damage) Minimum Magic Damage: 30/52.5/75/97.5/120 (+ 30% AP)
W: Isa/Raido
Agile Mode: Krint dashes a short distance extremely quickly, completely immune and untargetable for the duration. If Krint goes through an enemy projectile without taking damage with this ability, the cooldown is halved.
Type: Direction-Targeted Dash Range: 300 No cost CD: 13/12/11/10/9 seconds Duration: 0.25 seconds
Aggressive Mode: Krint dashes through its target, doing minor physical damage and placing it the exact same distance from them as it was before, but on the opposite side of them. Its next basic attack will have extra range and teleport Krint to the target as well as doing extra magic damage. Can be cast on towers but won't deal damage.
Type: Unit-Targeted Dash + Auto Attack Enhance Cast Range: 800 Cost: 5% current health CD: 3.5 seconds Physical Damage: 40/55/70/85/100 (+20% AD) Distance from Target: Same distance as original cast distance Auto Attack Range: 425 Auto Attack Magic Damage: 50/80/110/140/170 (+20% AP)
E: Uruz/Othala
Agile Mode: Krint knocks an enemy back and then instantly teleports behind them. Type: Targeted Knockback + Blink Cast Range: 475 Cost: 5% max health CD: 8 seconds Knockback Range: 400 (Just barely enough to take the fight out of a tower from the center) Physical Damage: 55/65/75/85/95 (+25% AD)
Aggressive Mode: Krint dashes to the backside of an enemy champion and damages anyone he passes through. He deals less damage to initial targets and deals more damage the more people he goes through. It also heals based on how many enemies it hits.
Type: Targeted Dash Range: 700 Cost: 10% of current health CD: 10 seconds Minimum Magic Damage: 40/60/80/100/120 (+0% AP) Bonus Scaling: +20% more base damage + 15% extra AP scaling per target Minimum Heal: 1/2/3/4/5% max health Bonus Scaling: +10/15/20/25/30 more raw health per target
Ult: Eihwaz/Thurisaz
Cost(for both): 3 stacks of Respite
Agile Mode: Krint enters the void, becoming completely invisible to wards and towers. While in the void it's nearsighted. Stars created by its abilities grant vision of the real world while in the void. Can be re-cast to enter the real world again. While in the void it has its Aggressive mode passive and its Agile mode abilities. NOTE: While in the void Krint can still be hit by stray skill shots and it can still hit enemies with its skill shots.
Type: Self-Buff CD: 80/70/50 seconds Duration: 2/3/4 seconds
Aggressive Mode: Krint blinks to his target. On impact, it creates a circle as large as Kindred's W. Anything (minions, enemy/friendly champions, projectiles), except Krint moves slower. The circle lasts for up to 15 seconds, but when it leaves the circle it gets destroyed immediately. When the circle expires, any projectiles inside get instantly destroyed. When Krint hits an enemy it gains its Agile mode passive but keeps its Aggressive Mode abilities for 15 seconds. If it kills an enemy within 15 seconds of the initial cast, can be recast to instantly teleport back to where it was before casting Thurisaz. Semi-Global range.
Type: Blink + Area of Effect Cast Range: 2500/3250/4000 CD: 120/100/70 seconds Area of Effect Range: 1075 Slow(affects projectiles as well): 40/50/60% reduced speed
Tl;Dr abilities
Passive:
Agile Mode: Attacking someone puts a Fiora Vital on them that reduces cooldowns If no enemies are nearby switches modes after 5 seconds
Aggressive Mode: Abilities place mini wards If there are enemies nearby switches forms after 5 seconds
Both: Kills and assists increase stats(move speed or damage depending on current mode). Up to 3 stacks
Q
Agile Mode: Nid Spear + Lee Q without an option to tp
Aggressive Mode: Ahri Q + opposite of Nid Spear
W
Agile Mode: Lucian E
Aggressive Mode: Teleport you to the opposite side of target + Ekko E auto attack
E
Agile Mode: Poppy E that teleports you to them after they get knocked back
Aggressive: Targeted dash that heals and does more damage based on how many people it passed through before reaching target
Ult
Both: Lose stacks of passive
Agile Mode: Super Duper Invisibilty! + Nearsighted + switch passives
Aggressive Mode: The 2nd part of Nocturne's Ult + an AoE slow that also affects projectiles + switch passives
Lore (WIP) Krint was born out of nothing into the void, before it was corrupted. It was originally born in the shape of a human giant, but it kept dripping. It decided to give life to some this spare goop. At first, the little goop creatures were well-behaved and got along well, but as it made larger creatures, they started going crazy, eating each other, murdering for no reason. Saddened by this, Krint wanted to fix its little perfect world. It discovered a portal to the real world, and decided to release all the evils of its universe. Thousands of years in the future, these Voidborns destroy Runterra, so Bard enters the Rift to stop Krint from letting more out. Reluctantly, Krint closes the portal, but the magical essence of Runterra corrupts the void, turning all its creations insane and giving them a burning desire to reach the outside world. All of the Voidborn thirst to reach the outside, no matter what it takes. Krint, fearing its life, re-opens the portal to escape its corrupt, ravaged world. In Runeterra, Krint makes a much more positive difference, its goop helps crops grow faster and larger, cure the sick and injured, and wherever it goes it brings good fortune. Worshiped and treated like a God, Krint enjoys this new, alien world. It cares for all the creatures of Runeterra and goes out of its way to protect anything living. It is said that it wouldn't even step on the grass in fear of harming a single blade. Eventually, it discovers that its creations are breaching their ever-expansive prison. It travels back to Icathia and seeks for Bard for help to save Runeterra. It uses its goop to cover the hole and manages to keep the gate sealed, but no longer has any spare goo. It no longer drips the universal remedy. Bard freezes the entire region in time, permanently. In the process, it destroys the entire lush grassland known as Shurima, replacing it all with golden sand. At first Krint is enraged that Bard would destroy everything, but later realizes that sometimes you must destroy every thing to repair it. Krint follows Bard to the Heavens and lives there with it forever, watching over Runeterra, guarding portals to the void.
Allies:
Bard
Soraka
Kassadin 
Enemies/Rivals:
Kog'Maw
Kha'Zix
Rek'Sai
Cho'Gath
Vel'Koz
Malzahar 
Any other Voidborn
Strategy In the Jungle, all its abilities essentially place wards, allowing it to have constant vision of what's happening, and in a fight its passive will let it have constant cdr, as all its abilities place it behind them. If you were to lane as Krint, it would be a god-tier farmer, as long as the other laner isn't there. While the enemy laner is there, as all its abilities are single target and do less damage than their aggressive counterpart, making it hard to farm. The point of Agile mode is to catch up, not to run away, and the point of Aggressive mode is to deal high magic damage. When you gank, you need to get the kill fast, before you switch to Agile mode, so you can have the highest possible damage output. However, if they manage to escape, Agile mode allows you to teleport in and out instantly. With its ultimate(as either mode) it can amplify the effectiveness of each form, since Agile mode's passive is more offensive and Aggressive modes abilities are as well(and vice versa for agility.)
Be as cruel as needed with your feedback, as long as I can use it to improve the concept.
Friendly Neighbor Bonus: http://boards.na.leagueoflegends.com/en/c/skin-champion-concepts/sp2MgAL7-zolt-the-anti-mana?show=nested&comment=0008