Combine 2 champs and their abiltiies
Just a few of mine :
passive: (dont have to name them) your first AA against a target burns them for true damage, you cannot use it on the same person twice in a row(pretty much love tap, but with gp's burn)
q: same as mf's q, but gets bonus gold if it kills target, and if the 2nd one hits then you get double the gold.
w: eat an orange, and strut dat ass
e: place a barrel, upon exploding it rains bullets upon the nearby area and slows
r: first waves of bullets towards anywhere along them map(mf's ult, but global)
passive: upon reaching low health, you gain a barrier scaling with your maximum mana, while the shield is up, you can AA someone to prevent them from moving for a short period of time
q: you can pull an enemy towards you, if you hit a wall, it will drag you towards it
w: you gain a speedboost and once it's finished you will be slowed and gain a shield
e: you stop the ground around you knocking up everything in a radius and slowing them
r: sends a depth charge that locks onto an enemy, upon hitting them it makes a giant field of electricity dealing damage and silencing nearby enemies. (no ult passive)
passive: if there is a low health ally within radius you gain a movement speed bonus when moving towards them, when nearby your AA's do bonus damage and swing faster
q: brings down a star, if it hits an enemy it heals you and bonded/nearby allies(as in when the stuff from rakas q reaches you it activates tarics q)
w: shields an ally and bonds them, upon them taking fatal damage while bonded you damage yourself to heal them(unless ur too low)
e: places a silencing field on the ground, if an ally is bonded it will place it in the direction their facing, the same distance away from them u placed it from u, if an enemy is in the field when it ends, it stuns them
r: after a 2 second delay, every single ally becomes invincible(global)
edit: i forgot to combine jhin and mf, i'm too lazy rn, so just imagine mf's ult, but with jhins range and bullets, every 4th wave critting
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= FiorIlle
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Lux' Koz
passive: gains fury and the more fury she gets, the more damage she does and her allies do more damage to enemies she hits
q: a double strike with her double dragon shields that stuns on impact
w: a torrent of flame and light surrounds her as she marks enemies for a debuff for more damage taken, buffs her armor and burns nearby enemies
e: She sends out a projection of her dragon shield, dashing to the first champ affected and lowering their armor
r: turns into a giant Sun-Dragon, the likes of which rival Aurelion Sol, and flies to a location which, once she gets there, will be ravaged by a sun-flare.
Notes: She is allied with the nation of Targacia
Her father was a dragon; her mother a Lunari
She's extremely protective of the things she loves
She loathes Yordles (but doesn't everyone?)
Her favorite food is praising the sun and fire and the tears of her enemies
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. I know it sounds weird, but hear me out.

Mordelaf, the Iron Beserker.
Anivoli (i know its dumb but i had fun with this)
Passive Hibernation: Upon dying Anivoli goes into a defensive hibernation state for 5 second recovering 33% of his missing hp. If he survives for 5 seconds he lives to fight on.
Q Rolling Frost: Anivoli drops on all fours gaining 20%movement speed as he charges towards the enemies for 4 seconds, gaining increasing more movement speed to fleeing enemies. Anivoli next basic attack flips the target behind him dealing 80% of his ap and are stunned for 1 to 1.5 seconds and slowed by 25% for 3seconds.
W Majestic Tundra: Anivoli slams the ground to summon a wall of tundra for 5 seconds. Passively enemies who come into contact with the wall are briefly slowed for 33%for 1 second.
E Frost Bite: Passively Anivoli gains increasing attack speed 5-25% stacking up to 3 times. Active once Anivoli has 3 stacks, he/she(idc) bites the enemy dealing 10% of the targets missing health and 50% of your ap. If the target has been stunned and or slowed by volina other abilities, the damage is doubled.
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and/or