I am updating my list for the Naya Dragons build basing on the recent top finish of RG Devotion decks in the Pro Tour Dragons of Tarkir. They proved that Dragonlord Atarka is a better choice than DL Dromoka and so I am including a full playset of the card along with Thunderbreak Regent. I have also changed the Atarka’s Command to Draconic Roar for added removal and damage.

Here is the second version of Naya Dragons:

Lands (24)
4 Wooded Foothills
2 Plains
4 Forest
3 Mountain
1 Mana Confluence
3 Windswept Heath
3 Temple of Plenty
4 Temple of Abandon

Creatures (25)
3 Courser of Kruphix
2 Dragonlord Dromoka
4 Dragonlord Atarka
3 Elvish Mystic
1 Harbinger of the Hunt
4 Thunderbreak Regent
4 Stormbreath Dragon
4 Sylvan Caryatid

Spells (11)
1 Ajani, Mentor of Heroes
1 Banishing Light
4 Crater’s Claws
3 Draconic Roar
1 Explosive Vegetation
1 Sarkhan, the Dragonspeaker

Here is the version one list.