How to evolve Wakanda? – Galaxy Attack: Alien Shooter Review

Hello, I warned Wakanda through PVP matches. It has 5/6 stars and all 3 skills are maxed out. How do I get the 6th star? All the other ships have a button called “evolution” in which you can evolve to the next star with gems and ship cards. However, Wakanda only has “Skill” and “Merge”. Consequently, you cannot merge ships until they have all of the stars. Thank you.
Review by PinkChocobo on Galaxy Attack: Alien Shooter.