Beside 3 Heroes in your team, you also have 2 Pets. This post will introduce to you all about Pets.
Pet is an important part in improving team fight with your heroes. Pets are also have their own attribute like your heroes. That why Pets is important as Heroes.
Pets can be summoned in Lottery like Hero
Pets cannot equip and promote like Hero
Pets have their own experience and use experience potion to level up like Heroes
Pets can be summoned or collect Pet soulstones by take a chance on Diamond in Lottery.
You can buy more Pet soulstones at Shop.