Welcome Caretakers to the spooky month of October. The developers at Storm8 decided to mix it up for dragons this month by mixing Spooky type and Dark Type dragons. Here's a good example. Introducing the Nevermore and Dark Leaf Dragons.
Nevermore can be obtained through events.
Dark Leaf can be obtained through breeding and events. Collect 20000 items each and both can be yours. Good luck!

Here's the info on both:

Nevermore Dragon
Click image for larger version.  Name: Nevermore_Epic.png  Views: 10  Size: 21.6 KB  ID: 47691
Rarity: Ultra Rare
Type: Spooky, Purple
Habitat: Boneyard, Purple Gardens
Available at: Level 32
Buying Price: 4,000 Gold
Selling Price: 100 Coin
Incubation: 18 hours
Exp Gained: 780 Exp
Collect 20000 Grand Cubes

Dark Leaf Dragon
Click image for larger version.  Name: Dark_Leaf_Epic.png  Views: 18  Size: 22.6 KB  ID: 47692
Rarity: Ultra Rare
Type: Dark, Black, Green
Habitat: Fiend Pit, Black Sands, Green Grove
Available at: Level 32
Buying Price: 4,000 Gold
Selling Price: 100 Coin
Incubation: 18 hours
Exp Gained: 780 Exp
Collect 20000 Grand Spheres