Warhammer AoS: Soul Arena Android Game Description:
The player gathers a team of characters and sends them to fight in the arena with other players. Opponents are selected automatically. The battles are also held without the player's participation. For each victory, the player receives a reward in diamonds.
Diamonds can be used to summon fighters. New stronger heroes can be obtained by merging the same characters that are of a  lower level. For greater efficiency of the team, you need to choose the right heroes according to their skilfulness. There are different rankings available.