Heroes Rage - online RPG with team battles.
Here you can choose one of the many unique heroes, find yourself a team and send to a closed arena, where the battles will be held. The game is filled with various effects, dynamic fights, abilities and spells, which are unique for each character class. It's kind of MOBA, just like Dota or Vainglory, but instead of five heroes there will be three in your team, which should make tactics and team actions more important.