Board Thread:Dragon City Gameplay Questions & Answers/@comment-5064374-20140104032724/@comment-10090661-20140126134826

@Boi: It's about net daily income. 1 Legend in one Habitat takes up the same area as 4 Pure Darks in a Big Dark Habitat. Pure Darks are easy to Breed. Legends aren't. There's another thread about this on the forum. Look for it. The calculations are there.