Using the same colored heroes significantly increases the chance to level up the special skill. It also provides more experience points per feeder hero. This might be an interesting topic for you: Leveling 3, 4 and 5 star heroes (Analysis, Advice).
Using the same colored heroes significantly increases the chance to level up the special skill. It also provides more experience points per feeder hero. This might be an interesting topic for you: Leveling 3, 4 and 5 star heroes (Analysis, Advice).