地獄重生

Even though you can't level up quickly Watching them grow slowly is also fun

It can be played too

You need to farm the Burning City a lot, as the demand for fragments is high later on.

For the start, keep all E+ or higher archers until you pull G or S rank later. For warriors, mages, and knights, keep S rank and dismiss the rest. Don't use gems to pull heroes; buy costumes and pets first.