Atakhan, Blood Roses in League of Legends Season 1 explained

“With Atakhan, we wanted to create an important gameplay objective that allows players to participate more in shaping the story unique to each game on Summoner’s Rift,” says the LoL developers. “Both team’s actions, their choices to fight or not, and where and when they do, will determine Atakhan’s location and form. Our goal is for this to ultimately let players actively create more variation to each game of League.”