Evolve can make pink hero become golden hero.
Hero Reincarnation +3
Hero Raise Star +10
Hero Upgrade +10
If you meet these 3 requirements, the pink hero can evolve
Evolve need Golden light, players can get them from event or Artifact Dungeon (next maintenance will come)
Evolve have 10 level, if your pink hero evolve to level 10, he will become golden hero.