Board Thread:Dragon City Gameplay Questions & Answers/@comment-24724301-20140323070348/@comment-44267942-20191126024234

im not sure if this is different because of an update but im pretty sure you earn stars by empowering your dragons with orbs at the tree of life. the lettered grades youre talking about are probably their battle ranks which you can get by earning points from defeating other dragons. you can get orbs by recalling them with the tree of life when you double up on a type of dragon, you can trade them for orbs to empower the one you already own! hope this helps