How do you unlock a mercenary?

Related questions

1. What are lunar coins?
2. How do you unlock Mercenaries in risk of rain?
3. What does the rusted key do in risk of rain 2?
4. How do you get the lunar in risk of rain 2?
5. What is the point of risk of rain 2?
6. Do lunar coins carry over?
7. Is Spellbreak coming to ps4?
8. How many levels are in risk of rain?
9. How many players can you have in risk of rain 2?
10. Is risk of rain 2 local coop?

Tags

1. #disagreement
2. #celestial
3. #through
4. #reaching
5. #about
6. #mercenary
7. #themselves
8. #portal
9. #unlock
10. #players
11. #sacrifice
12. #appear
13. #there
14. #obelisk