Arena of Heroes
The Arena of Heroes is a PvP league featuring a basic ladder system.
You win, you gain points and rise up the ladder. You lose and you drop points and fall down the ladder.
Be aware that you can be attacked while offline, so you’ll need a set up a formation with your strongest heroes for defense. Remember to update it regularly with the team you’re current using for the rest of the game.
There are daily rewards and end of season rewards. Both of which are currently a set amount of Diamonds depending on your ladder position.
Entering the Arena
It’s free for first 2 times (more with VIP levels), then it costs Arena Tickets which can be obtained from daily quests or buying them with 100 diamonds.
Multiple Ladders Per Server
This is not 100% confirmed and it could just be for very large servers, but it seems that there are multiple ladders of the arena for each server. How many exactly is unknown.
Pit Master’s Gift
Every time you win an arena match, you have a chance to obtain a “Pit Master’s Gift”. It’s a pretty rare drop, like 1% or so maybe.
What’s so special about it? Well, the reward is very random but it can extremely lucrative. There are screenshots of players obtaining over 6000 diamonds from a single chest.