Buff your favorite champion in a role different from their most popular role.
The next person then guts a champion by the champion's main/most popular role.
Example: Nami has several improved AP scalings, Tidecaller's Blessing now applies spell effects, and her passive now stacks with itself while speeding herself on cast instead of on hit. (AP)
The next person would then nerf support Nami.
Aqua Prison stun reduced, Tidal Wave now roots instead of knocks up, and her passive no longer buffs allies. (Utility/Support)
Now to start things off in the most boring sense...
: Can now attack during Lightning Rush, activating Electrical Surge gives attack speed, and Thundering Shuriken has an AD scaling and reduces armor of the enemy hit. Anyone stunned by his passive will have on-hit effects applied to them. (ADC)
AP Ratio increased, Ult grants a psuedo DFG, increasing all damage deal to champion from Naut by 20%. Passive gives extra scailing magic damage after each spell cast.
All skills now scale off of AP, E AP ratio increased to 0.9
Poison trail builds stacks on minions and monsters the longer they remain in the poison, increasing further damage dealt to them, stacking up to 5 times, and has no damage cap against minions and monsters. (Jungler)
passive now deals bonus true damage to neutral monsters.
Q AP Ratio increased from 1.0 to 1.2, Aoe increased
W now reflects .1 AP as damage as well
R Ratio increased from .3 to .5