Synergy is one of the ways to use the abilities of heroes most effectively. Using two synergistic heroes in one team can give you an advantage in battle.

For example, Solius can call Nightiel to assist in battle, thus they both can land their attack to one opponent.  

In addition, Nightiel has the ability to deal damage through the shield, also known as piercing damage, which can make your attacks even stronger, significantly reducing the enemy's Health bar.
We recommend that you carefully read the abilities of the heroes and take the synergy into account when selecting a team.