Idle Arena：Strongest trainer

Remember the days of fighting together, exploring towns and challenging gyms? You grow up, and they are still there, waiting for you silently...Just today, they are here to summon you, to become a powerful monsters trainer. GAME FEATURES: 1. Idle System -Set your monsters training while youre away. When you return to your phone, they will be stronger, gained new abilities, and ready for battle. Grow & Train a powerful squad without all the grinding! 2.More monsters，more strategy: - More than 200 monsters in different factions with specific skills. Summon your monsters, TRAIN them to become pow...