How do I get Black Market keys?

Black Market keys are given to all commanders who take active part in battles but the number of keys depends on the position taken:

In Domination, Beacon Rush, and Team Deathmatch:

Place	Win	Lose
1	5 keys	4 keys
2	4 keys	3 keys
3	3 keys	2 keys
4	2 keys	1 key
5	2 keys	1 key
6	2 keys	1 keys

In Free-For-All:

Place
1	4 keys
2	3 keys
3	3 keys
4	2 keys
5	2 keys
6	1 key

Additionally, you can get Black Market keys:

• as a reward in Operations;
• as a reward on the Black Market;
• by completing clan tasks (for B+ rank clans);
• by purchasing them directly through the in-game store.

To increase your Black Market keys income from battles use special boosters.