The title says it all. Make a buff which is useless buff to a champion ability.
Karthus gains 1337% movespeed whilst channeling Requiem.
Edit: I made a new one.
Xerath gains 10000% AD while channeling his Ult.
Elite4Runner22 votes
instantly kills anyone he sees
....
....
Get it! He's blind! >.<
Nameless Hero14 votesDiana gains 500% buff to AD and AP during **night ** time on Summoner's rift.
Elite4Runner17 votes[{quoted}](name=Nameless Hero,realm=EUW,application-id=Ir7ZrJjF,discussion-id=Xrgf43ln,comment-id=0002,timestamp=2015-04-07T08:22:29.432+0000)
Diana gains 500% buff to AD and AP during **night ** time on Summoner's rift.
Diana OP on Doombots
insaiyanbacca8 votesdiana nocturne are now the best combo in the game
Nameless Hero12 votes
is now equipped with google glass.
JPlayah12 votes
Gains a permanent +10 bonus to AD every time he uses mana.
Nameless Hero9 votes2 minions will now follow 
to collect milk
Blue Moon Wolf7 votes
gains 500 ap and 3000 mana for every friend he has
NinjaToad991 votes
So he gets 500 bonus AP and 300 bonus mana then.
Blue Moon Wolf1 votesno, she joined the cool kids when she got updated and left him in update hell with 
and 
. It's a sad tale, but what tale isn't sad when its about
IcyPepper6 votes
is immune to nerfs while in stasis.
Athenes Lulu6 votes
Gains +500 movement speed when he channels his drain.
Big Bang Bob5 votes His abilities do 1 trillion more damage when they miss.
BeatzBoyFTW4 votes
W- Courage
New active: Gains 1000/2000/3000/4000/5000 magic damage for 10 minutes.
ADCurryNRice7 votesBut 
...
SlackerboyTC2 votes
W- Courage
New active: Gains 1000/2000/3000/4000/5000 magic damage for 10 minutes.
Reason to build ap garen?
kokopelli21 votesYOUR A WIZARD
Duchess of Deer4 votes
gains 1000000 move speed while stunned
Xx420n0sc0p3sxX4 votesSomeone uses Bork on you or Malphite q and they go flying...lel
warpenguin5554 votes
gains immunity to all crowd control effects while dashing to a tunnel while using her ult
Spooky Spooker4 votes
gets 9999999999999999 Ap while axes are out.
Xx420n0sc0p3sxX9 votes
The oneshots begin
IcyPepper4 votes
's model becomes even sexier when casting charm.
theragingnerd1 votes
IMPOSSIBRU
Divewing3 votes
: Passive damage "crow control" requirements for activation now includes death. (Ie: passive amps his aa damage to any target that is stunned suppressed snared or dead)
SpiritGear3 votesCasting 's W his shadow gains %100000 AP and Movement speed
Laughing Fish3 votes Permanently gains 1 base AD every time anyone plays him.
Aura Master Fox3 votesWhenever an enemy champion is killed by one of 
's Mushrooms, their death recap is replaced by a picture of Teemo doing a victory dance.
esmelar3 votes
His bloblets gain 500 AD+ 100% crit chance
Mazianos3 votes
laughs after every kill. Minion, monster, champion or otherwise.
Elite4Runner2 votes
Ult grants allies 200% AD, AP, Attack Speed, Movement Speed, Armor, and MR while untargetable. lol
Kyoukocola4 votes
Janna would ruin that by using her delayed Q or Fiddlesticks with his Ult.
willcarry4gold2 votes
gains 9999999 ad while attacking somebody with a soldier
Sinneli2 votes
When you block an ability, you gain 1000 AP.
Maple Crusader7 votes
Hilariously enough, Sivir's Q does have an ability power ratio to it.
AuraMax3 votes would like this buff :)
Edit: i meant Veigar would like if an enemy Sivir had this buff. Because his ult scales with enemy AP.
ArcaneDonut2 votes
gains + 69696969696969696969% movement speed while channeling her ultimate
Aku no Momiji2 votes
When she has vision of an enemy, but they do not have vision of her, they can still hear her /laugh, but with a linear-over-time stereo pan in a random direction.
Stephenizgod2 votes
gains 500% attack speed while ulting.
Drackolus2 votessince his voidlings gain attack speed off of his attack speed and tend to attack whoever he's ulting, that actually wouldn't be entirely useless.
Stephenizgod2 votesNo they dont only off his bonus AD and Armor Penetration.
Ariaflux1 votesRumble's abilities get 1000% AP bonus damage when cast during overheating.
Kyoukocola2 votesRumble's abilities get 1000% AP bonus damage when cast during overheating.
Needs more thought. Rumbles second part of E can be cast during overheat or his Q and R.
AuraMax4 votes R full health Rumble .
has been slain.
BakedLotion1 votesAnivia gains 2000 mana once while her ult is active. Still goes oom.
Vel'Cock gains 31415926535% attack damage while channeling ult
AuraMax5 votesVel'Koz ult glitches, he accidentally autoattacks a 
with 
.
has been slain.
theragingnerd1 votesBTW THESE GAIN AP WHILE SOMETHING WORK WITH NASHORS TOOTH
SmknWdl1 votes
gains 100% Crit chance and 1000000000% damage scaling on his windwall