Create a "new" ability by combining two Champion's abilities
Example: 
R + 
R
Vi goes in with a point and click lockdown and in the meanwhile is immune to all damage for 2/2.5/3 seconds
Let us see what other evil the community can unleash.
44 Comments
R + R
Olaf kills everyone while giving exactly zero fucks.
R + 
R.
Nocturne ult with AoE knockup.
R + 
E
Terrain will not save you.
Q + 
W
Blitz hook with instant travel time and passes though minions? Good luck squishies.
Q + 
Q
Screw you melees.
A moving mf ult.
R + 
R
Oh wait...
R + 
R
Tibbers now throws out mushrooms in every direction when he spawns and every 5 seconds afterwards
R + 
R
Illaoi now locks all champions struck by ult in her circle until it ends, with no escape unless Illaoi leaves it
+ 
R's
Chogath now throws his mouth, dealing his true damage, but with Draven's global boomerang mechanic
Viegar ult plus karthus ult.
Deals MAGIC DAMAGE: 250 / 400 / 550 (+ 60% AP) deals 1.5% increased damage for every 1% of target's missing health, up to double damage against targets below 33.3% of their maximum health.
+ 
Chogath leaps to someone, leap distance scaling with health. upon landing, does over time physical damage scaling with AP and finishing with a burst of true damage scaling with health. if feast kills a unit, Chogath grows larger and gains max health.
+
hits all enemies on the map and pulls then to you while they are supressed
this would truly be the 'sit in fountain and R' ult for free penta kills
w + 
ult not the new one) imagine veigs indicator coming down on your team, stunning them and chunking them for a ton of health.
r + 
r pulls them in the knocks them up
w + 
W go fast while gaining tons of resistances
r plus 
each time she dashes she gains resistances based on ad/ap, every 3rd dash she does bonus magic damage scaling with ap, has a total of 3 charges, gets a charge upon killing a champion. the resistances stack. (imagine a full ap/ad akali with reistances stacking up to 8 times shudders
E+
R=oh.. wait
R.....
R + 
R
After channeling for 3 seconds, Karth'Koz unleashes a channeled beam for 2.5 seconds that deals damage to all enemy champions (regardless of distance), and slowing units hit by 20%. Enemies that stay in the beam will periodically gain Organic Deconstruction stacks. Deals True Damage instead of Magic against Researched units.
Q + R
Xin Zhao's next 3 basic attacks will deal 625 (+.2 AD)(+.6 AP) to all enemy champions regardless of distance. The third hit will knock up all enemy champions regardless of distance.
Cooldown: 5 seconds Mana Cost: 30 mana
R + R
q + passive
gain 1 stack of AP for every tick of his poison
Hello 1 shot gas
Q + 
Q
next basic attack Gains 125 range, deals bonus damage, breaks armor and gains stacks of bonus damage for every enemy he kills with his Q.
Q + 
Q = Nasus breaks free from CC and gains bonus movement speed and attack range, and his next basic attack does extra damage. If it kills an enemy, he gains +3/+6.
Q + Passive = Nasus gains Q stacks whenever he hits an enemy unit with his abilities.
E + E = AOE Point & Click DOT Stun with Armor Shred.
R + R = Nasus gains bonus armor, magic resist, movement speed, health regen, attack damage, ability power, and scaling armor and magic resist for 15 seconds, while doing 5% of nearby enemies' total max health per second as magic damage.
R + 
W
Lissandra entombs the area with black ice which deals damage to all enemies persists for 3s slowing all enemies. Enemies hit in the center are stunned and take 50% increased damage.
(This is in no way what I wished Liss' ult was btw, psh it'd be broken(and I'd love every single moment of it))
Q + 
E
Just Yas Q, only with the stun/slow effect added to it.
Thought I'd break the game.
R + R
Now with twice the Draven to make it even more Draven.
Q + passive
Every fourth Q stuns what it hits.
R + R
Chanel for 3 seconds, damage all enemies, heal all allies and self simultaniously.
W + Q
Tahm pulls a champion towards them and eats them. Works on both allies and enemies. If the enemy had 3 passive stacks or it was an ally, they are automatically eaten.
R + 
R
This is now a 5v8.
R+ 
R
Stun everyone in a circle and leave a lasting Anivia ult there.
R + 
R
For when you REALLY want that one person in particular to know that you are actively trying to kill them.
R + 
R
What? I don't... what... what are you trying to accomplish here?
R + Q
Teemo now leaves a wide trail of poisned shrooms that come out invisible and stay for 5 mins.
+ E
now when teemo hits a champion it taunts them.
W + 
W
now teemo is sped up and he slows nearby enemy units and reducing there attack damage.
Q + Q
teemo Q is now meant to replace his AA's and costs 20 mana and is on a 1 second cooldown and does AOE damage.
E + R
Corki rapidly fires a large wave of bullets in a cone in front of him, penetrating armor while dealing tons of damage for 4 seconds. This ability will not interupt his movement.
R + R
Ranged Tibbers spawns with a bunch of tiny Tibbers to bearslap everything, If you hit the Maiden of the Tibbers' target, it does an extra 10% max health damage
Veigar Passive + Brand Passive
:)
ult. Demacian justice for all!
E 
Q, rapid spins + heals every time the blade hits enemy champs.
hook E, basic attacks become AoE hooks.
ult, undying, cannot be slowed, basically on crack.
ult, 4 shots with Varus' snare.
Fizzlesticks: 
+
The thrown fish also casts crowstorm before jumping out.
W + E
also E + Q
Thresh hook plus alister aoe stacking stun pulse.
Or
Leona W and Rammus W
Twitch R and Jhin R gain jhin ult range with the piercing aa and every 4th auto does a bonus crit damage
Arrr, didn't expect to see you here...
R + R
Pulls in all enemies towards a line and deals tons of damage overtime. GG pentakill.
R + R on the Master Yi kit, just think about it.
Also 
R + R, CD would be malz, but continues afterward
E + 
E to replace 
ult (Note: I don't actually want this change)
Rek'Sai burrows over a large distance, channeling to move much faster and open short-lived tunnels (each lasts 3 seconds) through any terrain she burrows through. Allies and enemies alike can go through these tunnels.