Make a champion 100% useless in 5 words or less.
Spirit Visage deleted from game.
Spirit Visage deleted from game.

Friendly Fire enabled.

No change needed.
Remove DFG from the game.
Oh wait...
Wait another 4 patches.
DFG deleted from the game.
"Every new champion gets mobility"
I just destroyed like 60 champions. Your move.
Zhonyas cancels spells.

World Peace.
Minions are immune to abilities.
Uses mana.

power outage
kitchen's closed
monsoon season
last call for alcohol
time for choir
pottery class
have a bible with you

Oranges won't make you K

Stealth wards give true sight


Turrets die when he does.
Loses half stacks on death.
Beginning ultimate visible to enemies
Targeted abilities hit troll-pole
E tosses enemies forward

Therapy solved his anger problem.

Champions can become dizzy

Flash removed from the game.
Ahri got laid
The champions cant move.
Now they all are useless
E doesn't proc Q kappa
Turn off shadows
Uses ma- no he'd be fine...
Passive re- no he'd sill work...
Scales with A- no that could still work...
I got nothing.
Eternal solar eclipse.
Moon destroyed.
Ult is no longer global 
has to hatch first...
Taric removed from the game.
Quicksilver sash removed from game
spellvamp removed.
is now a vegetarian
charm doesn't amp damage, oh wait thats already happened.