The Wisdom is is one of the hero factions in the game.
As it deals increased damage when you use heroes of the faction that counter your opponent, and vice versa, 

The Wisdom faction counters the Resolute faction, while the Dynamic faction counters the Wisdom.

You will gain the following bonus attributes for all heroes from the Resolute faction based on how many are deployed on the battlefield:
- 2 deployed Heroes:
Troops: Increase Ferocity by 10%
Solo: Increase HP by 7%

- 3 deployed Heroes:
Troops: Increase Ferocity by 25% and Defense by 25%
Solo: Increase HP by 12%

To learn more about them in-game:
-Go to the Hero Hall in your city.
-Tap on Hero Recruitment.
-You’ll find the faction icons at the top right of the screen; Press on it for more details