I believe that there are many students in Cute Dragon Brawl who still don’t know how to hatch a legendary dragon in Cute Dragon Brawl. Now the editor of Source Code recommends "How to hatch a legendary dragon in Cute Dragon Brawl". Users who have questions in this regard come together. Take a look, maybe it can help you.
Elf Dragon: Lightning Dragon + Sunflower Dragon (Epic by-product Tiger Dragon).
Narwhal Dragon: Magnet Dragon + Lightning Dragon (epic by-product Storm Dragon).
Whirlpool Dragon: Mercury Dragon + Lightning Dragon (epic by-product Little Prince).
Siren Dragon: Mercury Dragon + Sunflower Dragon (epic by-product Agave Dragon Coral Dragon).
Dark Machine Dragon: Sunflower Dragon + Magnet Dragon (epic by-product Sweet Orange Dragon Swamp Dragon).
Giant Dragon: Magnet Dragon + Mercury Dragon (rare by-product Rust Dragon).
Root Dragon: Xiangyun Dragon + Farm God Dragon or Mud Ball Dragon + Leaf Dragon or Palm Dragon + Ruoshui Dragon.
Cosmic Dragon: Black Armor + Ruoshui.
Angel Dragon: Chief Dragon + Ruoshui.
What I want to remind you here is that this dragon is not guaranteed to appear, it just means that the probability is relatively high.