So uh... I know this is already a famous thread but I really want it to continue on the boards so... here we are.
Rules: One person names a champ and nerfs them. The next person has to give them a buff to compensate for the nerf. Then they nerf a champ of their own. Then we keep it going.
I'll start: 
All cooldowns are doubled
: The slow on shaco's e knife is increased to 99% for 10 seconds.
: Rend now only works on minions and monsters and the passive spears do not go into champions.
: he can still cast abilities whilst petrified and is untargetable making him basically an unkillable turret, good spot to do this would baron dragon or enemy base
: every time he gets an assist he is slowed by 50% for 5 seconds
: Ult will now move the friendly ulted champion to a safe location (tower) if they die.
: Can now only use two stances every 10 seconds.
: Death Lotus is uninterruptible except by death.
: Unbreakable damage reduction only applies to physical damage.
hitting a withered opponent with Q makes the Q automatically crit
Garen can now falter.
: Switching stances grants a shield equal to 500% of stance base mana cost, taking damage resets all stance cool downs.
: New Passive Buff "Passing Time" - Unless Maokai obtains a solo assist free champion kill once every 3 minutes, his wooden body will be Petrified, rendering him completely unable to move for the rest of the game.
Ultimate now brings targeted champion to akali as opposed to moving akali next to targeted champion. Dmg is doubled to immobilized targets
Brand takes continual max percentage health dmg to himself that scales with level.
All abilities now have a bonus 30% magic penetration
Is now targetable during Playful
: Triumphant roar grants a magic shield for a brief time.
: Concussive Blows only apply to Braum's autoattacks and Winter's Bite.
: Damage amp strength on charm is now doubled.
: Soldier attack speed also increases with Azir's AP
: Braum now leaps to his target when he auto attacks. This leap triggers concussive blows in one hit.
: Can now only charm guys.
That wasn't an azir nerf, so I cant buff him.
Ult can only be cast on champions below 25%/300-500-700 HP, whichever is lower.
: Kalista's passive now leaps her into auto attack range of the nearest champion as opposed to a fixed distance up to 1000 range; her spear now slows for 25% for 8 seconds and resets on each use of Kalista's passive resets Q cool down
; Zed's shadow's are targetable and if attacked they deal dmg to zed equal to 150% of the dmg dealt
- Ult will now instant-kill nukes a single enemy champion on a 30/30/30 cooldown.
- All of his moves now costs 10% HP, while ult costs 20% HP.
: Zed's razor shuriken and Shadow slash both deal 200% damage when dealt by his shadows and apply a 35% slow that lasts for 4 seconds
Teemo can step on his own mushshrooms and can no longer see them. They deal 150% true damage to him and the slow's duration is increased 1.5x
gains 50mr and 50 armor while invisible. It worked for !
Shroud now gives 50 armor and 50 magic resist to all enemies standing in it. (they stole it from her)
changing forms or attacking a marked enemy heals for 20/30/50% max health.
noxian diplomacy slows talon by 50% until he uses it.
Gains 1 AP at levels 6,11, and 16.
If Fizz does not deal damage to a champion with Playful/Trickster the cooldown is quadrupled.
: if her q hits someone they are knocked directly to Vi's nexus
: all hooks travel in opposite direction of where they are suppose to go
his hooks now have auto target and deal a % of max mana as true dmg
her rocket aoe can no longer crit
: Her passive now has the added bonus of increasing her AD/AS by 20/40/60% for the duration of her being excited
Nidalee's Spears are now melee range (100)
: Nidalee's q in cougar form has the range of her spear.
: His q only gives him 1 stack for a minion kill and he loses stacks every minute he is not with his team.
Garen gains Tenacity and MS for every half second Judgement deals damage.
Tristana's Rocket Jump no longer resets on kills.
can recast Rocket Jump within 2.5 seconds to return to her original position dealing damage upon lift off; cooldown is halved if she does not recast it.
's W no longer explodes.
Upon casting W, gains permanent Magic Resist and Armor.
The W is now a skillshot with far weaker damage and cannot spread.
His E can be cast on a single target and stuns for 2.5 seconds and slows everyone around
Can only get AP stacks from champion kills
: Windwall now heals Yasuo for every projectile blocked.
: Ace in the hole only scales on AP.
: Vi can now hold 10 charges on her E and it costs no mana.
: Using his ultimate ability destroys sight for his own team instead of the enemy's.
Caitlyn passively gains AP based on her total AD
Nocturne's trail removes enemy vision in and across it, like brush.
Hymn of Valor now has no travel time, applies on-hit effects like an autoattack.
Now, to nerf
Ult has a irreducible cooldown, including her passive.
: Ult can be steered like walking with a normal champion
: Can only ult enemies who are already dancing
