Your champion has four additional skills. What would they be (You don't have to list all of them)

Well I guess then the hotkeys would be Q W E R A S D F for all eight abilities. And I guess the new max level is 36

Cho'Gath

Q: Rupture

W: Feral scream

E: Vorpal Spikes (toggle)

R: Feast (Need lv 6)

A: (need level 7) Splinter; Shoots out spikes out in the ground and strikes 3 nearby enemies, stunning them for 0.5 seconds and reducing their armor by a small amount for 3 seconds. Cost: 75 mana 7 second cool down

S: (need level 7) Void grasp; Cho'Gath Focuses void energy into a Condenced orb and launches it to the target location. Targets hit get rooted and silenced for 3 seconds

D: (need level 7) Void Rage; (toggle) causes each attack to deal bonus damage and stun targets hit for 1 second. cannot be active while Vorpal spikes is toggled on.Also puts a mark of the void on the target. If a unit does while mark of the void is on them, Vorpal spikes shoot out from the unit, dealing damage to all enemies in a small area. cost: 15 mana per hit

F: (need level 24) Biomass Convergence (learned at levels 24, 29, and 34); Causes Cho'gath to grow tremendously larger and stronger, gaining increased life, attack damage resists, and ability power for 35 seconds. Cuts 10 seconds off Feast's cool down cost: 1 Stack of feast 250 Mana Cool down: 85 seconds

Oh, Nocturne.... So much I can do. :3

Q: Duskbringer

W: Shroud of Darkness

E: Unspeakable Horror

R: Paranoia

A: Dark Mask: Blinds the enemy and deals some magic damage.

S: Nightmare Eater: Feeds off the nightmares of a target affected by one of his abilities, healing him.

D: Striking Fear: Nocturne empowers his next basic attack to deal bonus damage. If used on a target who is feared, it will extend the fear by 1 second.

F: Eternal Nightmare: Nocturne can implant an Eternal Nightmare into any target while Paranoia's vision effect is active. This nightmare causes the targt to take magic damage over time and causes Nocturne's leap to deal additional physical damage.

I would do something to singed to make him really freakin' op, but i'm really tired and lazy.

luxanna crownguard

passive illuminate
Q-light bind
W-prismatic shield
E-lucent singularity
R-final spark
A-light blind (lux creates a intense flash of light in the face of a selected target blinding for a duration and causing damage)
S-extra light (lux reveal an area close to her for a time, reveal range increase with level)
D-prismatic barrier (protect a single ally from damage, when shield is destroys it blows up causing damage no nearby enemies) (its like sion shield)
F-final ray (after focusing for 2 seconds lux shoots a massive ray of light)

note: all the abilities apply her passive except her S extra light

Udyr
Q: Tiger Stance
W: Turtle Stance
E: Bear Stance
R: Phoenix Stance
A: Snake Stance (basic attacks poison)
S: Giraffe Stance (Grows neck 20 feet, instant kill in a 4000 unit radius)
D: Fish Stance (flops around and dies)
F: Bee Stance (Stings them and you die, giving the enemy 5% of their maximum health)

Draven
Q: Draven
W: Draven
E: Draven
R: Draven
A: Draven
S: Draven
D: Draven
F: Draven

Corki:

A- Missile Impact
Corki fires his missile on an area and deal AOE damage, leaving the area on fire and deal magic damage to enemies who remain over the area.

S- Hextech Mana Engine
Corki boosts forward to a location in front of him and gains 2 movement speed for 5 seconds.

D- Propeller Lift Off
Corki will raise altitude, allowing to move over terrain for 5 seconds.

F- Gatling Focus Fire
Corki's basic attack is converted into machine gun mode, making him deal physical damage to his target for 4 seconds

ill do another =3
Rumble- the mechanized menace

A: Gasoline Soak ; Soaks the target area in gasoline. Targets initially hit are slowed and have the buff 'Soaked' for 15 seconds. units passing through the soaked area get the 'Soaked' buff applied to them for 3 seconds. If Flamespitter is cast on the effected area, the area will burst in flames, causing magic damage to all units in the area per second. Flamespitter cast on units that are 'Soaked' take 75% additional damage over 3 seconds Danger zone bonus: Gassolined area lasts 3 seconds longer
20 heat
S: Junk-mech ; creates a small robot made of junk to attack nearby enemies. Junk-mechs are fragile ranged units that gain extra life and damage based on AP Danger zone bonus: Junk mechs deal 25% extra damage and last 10% longer 20 heat

D: Heat expel : Expells extra heat from Tristy, causing nearby enemies to take damage based on the amount of heat Rumble has. -=Can only be cast when in the danger zone=-. has a 3 second channel and disables rumble's ability to move and cast spells for 3 seconds after it is cast. Deals 10x the amount of current heat plus a base amount that scales with AP

F: Zero-Hour : Launches a barrage of heavy-duty missiles in a large area at long range, Dealing large damage and leaving a huge burned area for 15 seconds dealing damage over time. Has a 10 second channel and is canceled if Rumble takes any damage in that time.

I was too lazy to think of balanced damage or slow amounts =/ well anyway... More people should do this its really fun!!

Darius (Lol)

A: Bludgeon: Stuns for 1 second and deals damage. (Level 8)

S: Deadly Bleeding (Passive) : Enhances Hemorrhage's damage by 10 (Level 12)

D: Bloody Apprehend (Passive) : Apprehend does damage. (Level 14)

F: Noxian Wrath : Targets an enemy champion, dealing massive damage, if 20% HP Below, will insta-kill. (Level 18)