Magma Chamber

http://images2.wikia.nocookie.net/__cb20110112192039/leagueoflegends/images/b/bc/Leagueoflegends074.jpg (I did not make the image)

5v5

3 lanes, each with 2 turrets outside the base. There are 3 nexus turrets, but no inhibitors. Instead, super minions start spawning to replace seige minions at the 30 minute mark.

In the jungle, each quadrant has 3 camps. In the center of each half there is an area called a "Magma Chamber". If there are enough champions in the chamber for an even match (1v1, 2v2, etc), both of the Magma Chamber becomes "Sealed". A sealed magma chamber cannot be left by any means, and people outside the chamber cannot interfere with the chamber. The Magma chamber will open again after 40 seconds, or one team loses all of its members within the Chamber.

There are two individual chambers. They are shaped like A hexagon with a horizontal wall in the center of the chamber. The chambers are linked via a "Magma tube", which is a two-way corridor that functions like Magical Journey, but travel is much faster and you can only travel once every 10 seconds. Killing all of the enemies in the magma chamber causes all remaining combatants to be fully healed.

There are two epic jungle camps. On the topside, there is the Pheonix, who spawns at the 5 minute mark. Slaying it causes the magma chambers to unlock if they were sealed or on cooldown, deals 400 damage to the outermost towers of the enemy team, and causes the slayers team to deal 5% increased damage to champions for the next 6 minutes. The Pheonix spawns every 5 minutes, so if you can slay it repeatedly as soon as it spawns, the buff will stack up to 3 times, but is lost on death. On the bottom side, there is the Magma Golem. Slaying it causes your outermost towers to be shielded for 500 health and removes one stack of the Pheonix buff from the enemy team. The Golem respawns every 5 minutes.