Up Rpg!
It's similar to Korean Rpg, except way better.
You choose your hero, and you can actualy change your hero to a higher level version(Zlot to Fenix, Archon to Tassadar/Zeratul, etc). This is done in a similar way to Korean Rpg's 5000 Mineral Challenge.
This even has 1 spell per character,
the only problem is the boss. You just get reeeaaally tough and repeatedly go to the boss and fight,.
It's simple and stupid, but I miss it anyways