So, I'm stuck on the Asgard cup because I need a Legacy dragon. I researched her and it seems Pure Dark and Pure Terra should get what I need but when put those two in any of the breeding den/sanctuary/what not, I do not see it as an option. Are these the correct two? Do they need to be empowered? My sanctuary is at Level 6, so does it need to be higher? My tree and mountain are maxed out.
Following this, does anyone know what other dragons I should look out for in other quests, and how do I get them?