[Champion Concept] Karo Herfield, The Destiny Rider (mounted champion)
About him Well, i think he should be an ancient celestial being who discarded his immortality and embraced moon's and sun's powers to become new god of mankind. However, as he witnessed suffering and hardship of men, he decided to help humanity and protect it from evil. Being incorruptible he could walk freely even in the void and fight creatures of darkness. For many years he fought against darkness and kept Runeterra as it should be. Now, after feeling huge threat approaching, he is forced to return to Valoran and join the mightiest heroes to fight creatures of darkness and evil.
~~ ~~
COMBAT
Attack range: 210
~~ ~~
Passive: Destiny Charger: after not being in combat for 6/5/4 sec or more, your horse becomes rested and your movement speed increases by 80/100/120. Bonus speed will last for 1,5 sec after entering combat.
~~ ~~
Cross of Hope [q] Summon golden cross to fall at targeted area dealing 40/70/100/130/160 (+40% of ability power) (+10% of attack damage) magic damage to enemies in targeted area. In addition, cross stays in the ground for 4 sec granting nearby allied champions 25/35/45/55/65% bonus base health regen. Cooldown: 9/8/7/6/5 sec Mana cost: 35/40/45/50/55 Range: 680 Range of AOE: 135 Range of buff: 300 Casting time: 0,15 sec Delay before hitting: 0,5 sec
~~ ~~
Twilight and Dawn [w] Buff friendly target giving him/her 10/15/20/25/30 (+1 per 20 attack damage) bonus armor and magic resist for 5 sec. In addition, affected target will also be healed for 1% (+1% per 250 ability power) of his/her max health every sec. However, it affected target is killed, then you will automatically heal yourself for 7% (+1% per 100 ability power) of your max health. Cooldown: 14/13/12/11/10 sec Mana cost: 70 Range: 550
~~ ~~
Destiny Stomp [e] Cause your horse to stomp with his front feet dealing 100/145/190/235/280 (+125% of attack damage) to nearby enemies and knock them into air for 1 sec. Cooldown: 12 sec Mana cost: 50 Range: 325 Casting time: 1 sec
~~ ~~
Darkness Against Darkness [r] Shroud yourself in shadows blocking nearly all light and reducing vision range of nearby enemies/ wards by 75%. In addition, whenever a nearby enemy champion use any of his/her abilities your basic attacks becomes empowered causing your next basic attack to deal 100/120/140 (+20 of attack damage) (+15% of ability power) more physical damage (can be critical). Empowered basic attacks can stack up 3 times and not attacking anyone for 6 sec or more will remove empowered state. This ability lasts for 5/6/7 sec. Cooldown: 140/120/100 sec Mana cost: 150 Range of shadows: 450/500/550
~~ ~~ Some build examples:
for TOP
for MID
for JUNGLE
joke ADC
~~ ~~
Friends:

Enemies:

~~ ~~ Strategy
Playing as him You would want to roam as much as you can and get as fed as you can. Early in 1v1 lane you don't pose a huge threat, but because of your passive and knock up you can easily roam and gank other lanes. If you don't roam, then try to farm your lanes as careful as possible and always try to stay at good health, save up your R when your jungler is ganking. If you are the one who is ganking, then try to not be hit as much as you can and keep your passive active until you reach an enemy. Q is easy to spam and good tool for AP and AD builds, so building mana is a good thing. Putting you W on dying minions is also a good way to get some healing.
Playing versus him He is weak early and have to stay near his Q to stay healthy. He lacks engages without his passive, and even then can lose his bonus movement speed quickly after being poked. Evade his Q and try to save up your escape tool until he uses his E. He is much more dangerous when withing with a friend, so place some wards around the map to know who is nearby. His R doesn't give him bonus damage if you don't use your abilities, so any ADC should rely more in his/her basic attacks while nearby this champ. Even late game he is only threat when fighting in groups, try to fight him when he is alone.