Mulligans
The main focus of the deck is to counter jade and reno decks, by using Shadowflame effectively, and out-tempoing them with Mountain Giant, and Twilight Drake. The value game is sealed with cards like Ragnaros the Firelord, Lord Jaraxxus , and Ysera.
keep all dragons, unless you are sure the deck is aggro. Always mullagin for Mountain Giant and Twilight Drake, too. The best dragons to discover from Netherspite Historian are chromaggus, twilight drake, ysera, and alexstrasza, yet mose other dragons work fine too.
GG, meta!