How to get 5 star heroes?

You can merge 4 star heroes to become five star heroes, but they don't have the same potential as those heroes that are natural 5 star heroes, and have started at 5 star.

You can get natural 5 star heroes through heroic summons, prophet orbs, prophet tree, via campaign mode and tower of oblivion and by the wishing tree and casino.

They are the rarest type of hero to get.

You can also get a 5 star Norma by completing registration of the game (ie. Make an account with your email address)

Sprit drops from Campaign idle rewards. You can also buy it from the marketplace but that is not recommended. The only place buying spirit is viable is in Aspen Dungeon later game. Idle rewards from Campaign cap out after 8 hours so make sure to log in and collect them every 8 hours.