I have been thinking and came up with at least three new medals or worthwhile status effects.
Medals or Status Effects:
Medal of Adolescence or Status Effect
- Transformed troops on your team have all the traits and are level 20. (if already owned)
Medal of Pacifism or Status Effect
- No Skulls or Doomskulls during the battle are coming from above. (except for abilities)
Medal of Pandemic or Status Effect
- No reinforcements are coming to the rescue. (60/60 spawn limit already reached from the start)