Power Soul items can be acquired through several methods:
- Daily Loot Battles, get 1-9 power souls per battle
- Login Bonus
- Gammet Shop, 10 Gammets per Power Soul or 5 Gammets on sale
- Nimbus Travel Reward
- Buying/Spending Events
Once you have more than 5 Power Souls, you can add them to the Power Soul Ball. Adding Power Souls to the Ball will increase the bar by 5 points, or 10 points if it procs. A 10 point increase will also get you and extra soul for the base hero you are using for the Power Soul Ball. Once the bar reaches the end, you will receive 1 soul towards the advanced hero and the bar will reset to 0. Some Heroes take more souls to completely fill the bar, depending on the hero rank and rarity.