- Get Chest to obtain parts to upgrade arms. You can get it in the follows
- When you win a battle, you may get a Victory Chest (Common, Rare, Epic chests) based on the battle results.. You can also purchase them in the shop.
- You can get a Free Chest every four hours. However, it is limited to three times a day.
- You can get a Stage Chest , When you win each stage with three stars in the Single Player Campaign mode.
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