Absolutely gut a champion with a single change....
Example:
(Q) Mystic Shot - No longer applies on hit effects.
Example:
(Q) Mystic Shot - No longer applies on hit effects.
E now has a .75 second delay.
(Obligatory)
Q can no longer target minions.
W- Feared enemies now run immediately out of box attack range
Oh, wait.
Animation cancelling removed from the game.

Ball Travel speed reduced
Passive requires four ability casts to activate.
Ult prevented by CC.
Koreans banned from League.

(Q) Crescent Strike - Path of the ability glows for .5 seconds before it fires.
Q Root removed. Now slows enemy by 50%.
Ult no longer suppresses.
While channeling, a warning circle appears where his ult is headed.
Ult no longer heals.
Q now can only be active for 2 seconds at a time. 6 second cooldown.
Passive removed. New passive - Sona gains 1 bonus AD for each nearby neutral monster (100 range).
Ult range reduced to 400/600/800 from 1200/1500/1800.
Q missile speed and hitbox radius reduced by 50%.
W can no longer [CENSORED _ RIOT GAMES INC]
W - Ranged reduced from 400 to 325.
....
T.T
Ult range reduced to 450 heyyyyyyyyy
But seriously though,
Q and W only hit one champion instead of two.
Miss Fortune: Bullet Time- physical damage removed...wait a minute.
Pulls can now target friendly champions, and minions.
(ohwait)
Passive: Unable to leave Nexus
0.75 sec delay on E.
Oh wait.
All jungle enemies are so strong only a few can reasonably defeat them. All other junlgers are gutted. Oh wait, that already happened.
Reduced ult range, but lower mana cost to compensate
oh wait
Cougar Form W now has stacking mana cost
oh wait
ult is now a skillshot
q now a skillshot
ult now a skillshot
q now a skillshot
ult now a skillshot
ult now a skillshot
see how many champs I can ruin with this one change
and of course
ult now has a 0.75 second delay
Highlanders CD reduction of basic abilities on kill or assist reduced to 50% (from 70%).
Equilibrium Strike slow/stun duration reduced to .5/.75/1/1.25/1.5 (from 1/1.25/1.5/1.75/2.0)
Infected Cleaver health cost increased to 70/80/90/100/110 (from 50/60/70/80/90)
Valor CD increased to 16/14/12/10/8 (from 10/9/8/7/6)
Spear shot mana cost increased to 65 (from 45)
Battle fury crit chance reduced to .2 per 1 point of fury (from .35)
Malefic Visions now does 50% damage to minions and monsters. (from 100%)
ult can now be blocked by minions.
I have the slightest feeling that when Veigar had a gun up to this person's head telling them to make this post. We know he was there when riot said his stun was being buffed again.
Kalista- Rend has maximum 3 spears
: Now uses mana, given the lowest mana amount and mana regeneration in the game.
: Ult no longer taunts.
: No longer grants energy when E is landed.
: Q damage stacks by .5 instead of 3.
Stealth doesn't actually hide you from Champions. (Oh, wait.)
Before ulting, Fiddlesticks must deploy a warning alarm, and tape off the area to be ulted with yellow caution tape according to OSHA regulations.
Any attack speed reduction. at all. Seriously, it's like her only stat.
(etc.) Made slightly less attractive.
Now has to walk until she finds Bristle and tames him. Must do so each respawn.
Can only swim.
Can no longer float or fly over walls. (Oh, wait.)
Ahri's now ugly, so charm actually causes targets to flee.
People suddenly discover champion X can counterplay Rito's posterboys.
(Q) Acid Hunter - Has a 10 second cooldown
R only blocks damage from other champions. No longer blocks crowd control or turret shots.
The
nerfs made me cringe so hard, well played, and contribootin..
: Ult now lets out a global shout.
Not entirely sure how much this would effect him during the lane phase but it would suck quite a bit during the teamfighting stage.
[E] Righteous Fury no longer splashes.
Any champion: "compensation"
Replace rage with mana.
Q now does not split the cooldown if boomerang is caught when coming back
R's range has been reduced
Q is now a slow
Can only ult off his own knockups.
No longer has built-in spell vamp.
Can no longer pulverize into a headbutt--you must do one or the other.
"Hunt" passive removed without compensation (she has two passives, anyway).
allies can no longer apply passive stacks. Only Braum can.