Series

All Hero units usually fall under a specific series. The Series provides passive skills to heros of their series.
Completion of a series in their respective base can unlock the tank for that series.

1 star base series:

• Normal Series
• Flame Series

3 stars base series:

• Snow Series
• Crown Series
• Poison Series
• Beast Series

4 stars base series:

• Silverwing Series
• Orc Series
• Dragon Series
• Rusalka Series
• Dwarven Series
• Demon Series

5 stars base series:

• Serph Series
• Fury Series
• Wyvern Series
• Automation Series
• Inferno Series
• The Pirates of Flame Series