K, so.
Legend of the Poro King
What is this game mode?
It's a blind draft played on the Howling Abyss, and it retains the original goal of taking out the enemy towers, inhibitors and then Nexus. There are a few twists however.
The Poro King
One of your summoner spells allows you to throw poros at the other team. The first team to pelt the other ten times summons the Poro King to fight for their team!
Pretty damn big, as you can tell. The Poro King at first seems to be just a massive, glorified minion that is immune to CC, but he does some cool stuff:
He's very tanky, albeit does very little damage
Allied champions in the radius shown above gain bonus Health, Mana, and Energy Regeneration
Tossed enemy poros that enter the radius are automatically drawn to him
Allies may cast To The King! to instantly dash to him
Poros fly off of him and deal damage when they land
Once summoned, the Poro King deals damage in an area when he lands (pretty much Grand Skyfall). When dispelled, his team's Poro Counter returns to 0, meaning that they must hurl ten more poros to get him on their side again. The enemy thus gets more than enough time to summon him for themselves!
On a side note: As long as the Poro King is active, no poros tossed can count towards the ten poros needed to summon the Poro King. This goes for both the team that the Poro King is with, and the team that he's against.
Summoner Spells
You will not be using the standard summoner spells. Instead, you get two new ones!
Poro Toss (20s cooldown): Throw a poro a very long distance in a direction. The first enemy hit takes true damage and is marked and revealed for 3 seconds. Upon hitting an enemy (aside from the Poro King) you may recast Poro Toss within the next three seconds to dash to that enemy (you are untargetable during the dash). If you do, Poro Toss's cooldown is lowered by 5 seconds.
To the King! (10s cooldown): Dash to the Poro King (you are untargetable during the dash). You may only cast this when the Poro King is active for your team.
What are people playing?
Assassins, bruisers, and champs with considerable CC (such as Leona). My personal favorite champions to play in this mode are Pantheon, Lee Sin, and Wukong, but any champion can do well in this mode.
The usual bans are Katarina, Pantheon, Wukong, Sona, Galio, and Fizz.
Why do my poros look plain and that guy has a cool poro in a space suit?
Well, that would be because he happens to have the Astronaut Poro summoner icon!
There are five different Poro icons, and each will be sold during Snowdown for 250 RP (not sure if they will be available for purchase with IP). When you buy one, they will change the appearance of the poro in Legend of the Poro King, however the icons themselves are permanent once bought.
Dragonslayer Poro:
Astronaut Poro:
Shadow Isles Poro:
Battlecast Poro:
Gentleman Poro:
What is this music playing in the background?
That would be more familiar to the veterans, as it's the music of the old Winter Summoner's Rift maps! Besides, the Howling Abyss music isn't the best when you're too busy chucking poros at each other anyway.
Full Game
Here's one from Redmercy.