Merit can be used for training generals, motivation in Pagoda Infiltration, etc.

It can be gained through the following ways:

No Method of Earning Merits
1 The most easy way to gain Merits is by winning battle from the scenario and Army War.
2 Tavern Chat, Levy Event or Patrol System
3 Newbie Card or Clan Card from the Event. (Additional)
4 Completing the Daily Quest (the harder Quest , the more Merits you will get).
5 Joining the Arena Battle. The higher ranking you qualified, the more Merits you gain.